<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <link:roleRef xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#esef_role-000000" roleURI="http://www.esma.europa.eu/xbrl/role/all/esef_role-000000" xlink:type="simple"/>
    <link:roleRef xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#ias_1_role-210000" roleURI="http://www.esma.europa.eu/xbrl/role/all/ias_1_role-210000" xlink:type="simple"/>
    <link:roleRef xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#ias_1_role-320000" roleURI="http://www.esma.europa.eu/xbrl/role/all/ias_1_role-320000" xlink:type="simple"/>
    <link:roleRef xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#ias_1_role-410000" roleURI="http://www.esma.europa.eu/xbrl/role/all/ias_1_role-410000" xlink:type="simple"/>
    <link:roleRef xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#ias_7_role-520000" roleURI="http://www.esma.europa.eu/xbrl/role/all/ias_7_role-520000" xlink:type="simple"/>
    <link:roleRef xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#ias_1_role-610000" roleURI="http://www.esma.europa.eu/xbrl/role/all/ias_1_role-610000" xlink:type="simple"/>
    <link:calculationLink xlink:role="http://www.esma.europa.eu/xbrl/role/all/esef_role-000000" xlink:type="extended"/>
    <link:calculationLink xlink:role="http://www.esma.europa.eu/xbrl/role/all/ias_1_role-210000" xlink:type="extended">
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_EquityAndLiabilities" xlink:label="ifrs-full_EquityAndLiabilities_terseLabel" xlink:title="ifrs-full_EquityAndLiabilities_terseLabel"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Liabilities" xlink:label="ifrs-full_Liabilities_terseLabel" xlink:title="ifrs-full_Liabilities_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_EquityAndLiabilities_terseLabel" xlink:title="ifrs-full_EquityAndLiabilities_terseLabel to ifrs-full_Liabilities_terseLabel" xlink:to="ifrs-full_Liabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentLiabilities" xlink:label="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentLiabilities_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_Liabilities_terseLabel" xlink:title="ifrs-full_Liabilities_terseLabel to ifrs-full_NoncurrentLiabilities_terseLabel" xlink:to="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherLongtermProvisions" xlink:label="ifrs-full_OtherLongtermProvisions_terseLabel" xlink:title="ifrs-full_OtherLongtermProvisions_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentLiabilities_terseLabel to ifrs-full_OtherLongtermProvisions_terseLabel" xlink:to="ifrs-full_OtherLongtermProvisions_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DeferredTaxLiabilities" xlink:label="ifrs-full_DeferredTaxLiabilities_terseLabel" xlink:title="ifrs-full_DeferredTaxLiabilities_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentLiabilities_terseLabel to ifrs-full_DeferredTaxLiabilities_terseLabel" xlink:to="ifrs-full_DeferredTaxLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherNoncurrentFinancialLiabilities" xlink:label="ifrs-full_OtherNoncurrentFinancialLiabilities_terseLabel" xlink:title="ifrs-full_OtherNoncurrentFinancialLiabilities_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentLiabilities_terseLabel to ifrs-full_OtherNoncurrentFinancialLiabilities_terseLabel" xlink:to="ifrs-full_OtherNoncurrentFinancialLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Assets" xlink:label="ifrs-full_Assets_terseLabel" xlink:title="ifrs-full_Assets_terseLabel"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentAssets" xlink:label="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_Assets_terseLabel" xlink:title="ifrs-full_Assets_terseLabel to ifrs-full_NoncurrentAssets_terseLabel" xlink:to="ifrs-full_NoncurrentAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#wiit_OtherTangibleAssetsIncludingRightOfUseAssets" xlink:label="wiit_OtherTangibleAssetsIncludingRightOfUseAssets" xlink:title="wiit_OtherTangibleAssetsIncludingRightOfUseAssets"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel to wiit_OtherTangibleAssetsIncludingRightOfUseAssets" xlink:to="wiit_OtherTangibleAssetsIncludingRightOfUseAssets" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#wiit_DebtsToOtherLendersNonCurrent" xlink:label="wiit_DebtsToOtherLendersNonCurrent" xlink:title="wiit_DebtsToOtherLendersNonCurrent"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentLiabilities_terseLabel to wiit_DebtsToOtherLendersNonCurrent" xlink:to="wiit_DebtsToOtherLendersNonCurrent" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentLiabilities" xlink:label="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_Liabilities_terseLabel" xlink:title="ifrs-full_Liabilities_terseLabel to ifrs-full_CurrentLiabilities_terseLabel" xlink:to="ifrs-full_CurrentLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentTaxLiabilitiesCurrent" xlink:label="ifrs-full_CurrentTaxLiabilitiesCurrent_terseLabel" xlink:title="ifrs-full_CurrentTaxLiabilitiesCurrent_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel to ifrs-full_CurrentTaxLiabilitiesCurrent_terseLabel" xlink:to="ifrs-full_CurrentTaxLiabilitiesCurrent_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherCurrentFinancialLiabilities" xlink:label="ifrs-full_OtherCurrentFinancialLiabilities_terseLabel" xlink:title="ifrs-full_OtherCurrentFinancialLiabilities_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel to ifrs-full_OtherCurrentFinancialLiabilities_terseLabel" xlink:to="ifrs-full_OtherCurrentFinancialLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers" xlink:label="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_terseLabel" xlink:title="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel to ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_terseLabel" xlink:to="ifrs-full_TradeAndOtherCurrentPayablesToTradeSuppliers_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Equity" xlink:label="ifrs-full_Equity_terseLabel" xlink:title="ifrs-full_Equity_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_EquityAndLiabilities_terseLabel" xlink:title="ifrs-full_EquityAndLiabilities_terseLabel to ifrs-full_Equity_terseLabel" xlink:to="ifrs-full_Equity_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_EquityAttributableToOwnersOfParent" xlink:label="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_Equity_terseLabel" xlink:title="ifrs-full_Equity_terseLabel to ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:to="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_StatutoryReserve" xlink:label="ifrs-full_StatutoryReserve_terseLabel" xlink:title="ifrs-full_StatutoryReserve_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel to ifrs-full_StatutoryReserve_terseLabel" xlink:to="ifrs-full_StatutoryReserve_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentAssets" xlink:label="ifrs-full_CurrentAssets_terseLabel" xlink:title="ifrs-full_CurrentAssets_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_Assets_terseLabel" xlink:title="ifrs-full_Assets_terseLabel to ifrs-full_CurrentAssets_terseLabel" xlink:to="ifrs-full_CurrentAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentTradeReceivables" xlink:label="ifrs-full_CurrentTradeReceivables_terseLabel" xlink:title="ifrs-full_CurrentTradeReceivables_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentAssets_terseLabel" xlink:title="ifrs-full_CurrentAssets_terseLabel to ifrs-full_CurrentTradeReceivables_terseLabel" xlink:to="ifrs-full_CurrentTradeReceivables_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties" xlink:label="ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_terseLabel" xlink:title="ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel to ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_terseLabel" xlink:to="ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentReceivablesDueFromAssociates" xlink:label="ifrs-full_CurrentReceivablesDueFromAssociates_terseLabel" xlink:title="ifrs-full_CurrentReceivablesDueFromAssociates_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentAssets_terseLabel" xlink:title="ifrs-full_CurrentAssets_terseLabel to ifrs-full_CurrentReceivablesDueFromAssociates_terseLabel" xlink:to="ifrs-full_CurrentReceivablesDueFromAssociates_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherCurrentAssets" xlink:label="ifrs-full_OtherCurrentAssets_terseLabel" xlink:title="ifrs-full_OtherCurrentAssets_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentAssets_terseLabel" xlink:title="ifrs-full_CurrentAssets_terseLabel to ifrs-full_OtherCurrentAssets_terseLabel" xlink:to="ifrs-full_OtherCurrentAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentContractAssets" xlink:label="ifrs-full_NoncurrentContractAssets_terseLabel" xlink:title="ifrs-full_NoncurrentContractAssets_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel to ifrs-full_NoncurrentContractAssets_terseLabel" xlink:to="ifrs-full_NoncurrentContractAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentContractAssets" xlink:label="ifrs-full_CurrentContractAssets_terseLabel" xlink:title="ifrs-full_CurrentContractAssets_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentAssets_terseLabel" xlink:title="ifrs-full_CurrentAssets_terseLabel to ifrs-full_CurrentContractAssets_terseLabel" xlink:to="ifrs-full_CurrentContractAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#wiit_DebtsToOtherLendersCurrent" xlink:label="wiit_DebtsToOtherLendersCurrent" xlink:title="wiit_DebtsToOtherLendersCurrent"/>
        <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel to wiit_DebtsToOtherLendersCurrent" xlink:to="wiit_DebtsToOtherLendersCurrent" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentContractLiabilities" xlink:label="ifrs-full_NoncurrentContractLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentContractLiabilities_terseLabel"/>
        <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentLiabilities_terseLabel to ifrs-full_NoncurrentContractLiabilities_terseLabel" xlink:to="ifrs-full_NoncurrentContractLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentContractLiabilities" xlink:label="ifrs-full_CurrentContractLiabilities_terseLabel" xlink:title="ifrs-full_CurrentContractLiabilities_terseLabel"/>
        <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel to ifrs-full_CurrentContractLiabilities_terseLabel" xlink:to="ifrs-full_CurrentContractLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan" xlink:label="ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_terseLabel" xlink:title="ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_terseLabel"/>
        <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentLiabilities_terseLabel to ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_terseLabel" xlink:to="ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentDebtInstrumentsIssued" xlink:label="ifrs-full_NoncurrentDebtInstrumentsIssued_terseLabel" xlink:title="ifrs-full_NoncurrentDebtInstrumentsIssued_terseLabel"/>
        <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentLiabilities_terseLabel to ifrs-full_NoncurrentDebtInstrumentsIssued_terseLabel" xlink:to="ifrs-full_NoncurrentDebtInstrumentsIssued_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RightofuseAssets" xlink:label="ifrs-full_RightofuseAssets_terseLabel" xlink:title="ifrs-full_RightofuseAssets_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel to ifrs-full_RightofuseAssets_terseLabel" xlink:to="ifrs-full_RightofuseAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PropertyPlantAndEquipment" xlink:label="ifrs-full_PropertyPlantAndEquipment_terseLabel" xlink:title="ifrs-full_PropertyPlantAndEquipment_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel to ifrs-full_PropertyPlantAndEquipment_terseLabel" xlink:to="ifrs-full_PropertyPlantAndEquipment_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentFinancialAssets" xlink:label="ifrs-full_CurrentFinancialAssets_terseLabel" xlink:title="ifrs-full_CurrentFinancialAssets_terseLabel"/>
        <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentAssets_terseLabel" xlink:title="ifrs-full_CurrentAssets_terseLabel to ifrs-full_CurrentFinancialAssets_terseLabel" xlink:to="ifrs-full_CurrentFinancialAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Goodwill" xlink:label="ifrs-full_Goodwill_terseLabel" xlink:title="ifrs-full_Goodwill_terseLabel"/>
        <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel to ifrs-full_Goodwill_terseLabel" xlink:to="ifrs-full_Goodwill_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill" xlink:label="ifrs-full_IntangibleAssetsOtherThanGoodwill_terseLabel" xlink:title="ifrs-full_IntangibleAssetsOtherThanGoodwill_terseLabel"/>
        <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel to ifrs-full_IntangibleAssetsOtherThanGoodwill_terseLabel" xlink:to="ifrs-full_IntangibleAssetsOtherThanGoodwill_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#wiit_GroupResultInThePeriod" xlink:label="wiit_GroupResultInThePeriod" xlink:title="wiit_GroupResultInThePeriod"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel to wiit_GroupResultInThePeriod" xlink:to="wiit_GroupResultInThePeriod" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherCurrentLiabilities" xlink:label="ifrs-full_OtherCurrentLiabilities_terseLabel" xlink:title="ifrs-full_OtherCurrentLiabilities_terseLabel"/>
        <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel to ifrs-full_OtherCurrentLiabilities_terseLabel" xlink:to="ifrs-full_OtherCurrentLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DeferredTaxAssets" xlink:label="ifrs-full_DeferredTaxAssets_terseLabel" xlink:title="ifrs-full_DeferredTaxAssets_terseLabel"/>
        <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel to ifrs-full_DeferredTaxAssets_terseLabel" xlink:to="ifrs-full_DeferredTaxAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherNoncurrentFinancialAssets" xlink:label="ifrs-full_OtherNoncurrentFinancialAssets_terseLabel" xlink:title="ifrs-full_OtherNoncurrentFinancialAssets_terseLabel"/>
        <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel to ifrs-full_OtherNoncurrentFinancialAssets_terseLabel" xlink:to="ifrs-full_OtherNoncurrentFinancialAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Inventories" xlink:label="ifrs-full_Inventories_terseLabel" xlink:title="ifrs-full_Inventories_terseLabel"/>
        <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentAssets_terseLabel" xlink:title="ifrs-full_CurrentAssets_terseLabel to ifrs-full_Inventories_terseLabel" xlink:to="ifrs-full_Inventories_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncurrentPortionOfNoncurrentLoansReceived" xlink:label="ifrs-full_NoncurrentPortionOfNoncurrentLoansReceived_terseLabel" xlink:title="ifrs-full_NoncurrentPortionOfNoncurrentLoansReceived_terseLabel"/>
        <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentLiabilities_terseLabel" xlink:title="ifrs-full_NoncurrentLiabilities_terseLabel to ifrs-full_NoncurrentPortionOfNoncurrentLoansReceived_terseLabel" xlink:to="ifrs-full_NoncurrentPortionOfNoncurrentLoansReceived_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashAndCashEquivalents" xlink:label="ifrs-full_CashAndCashEquivalents_terseLabel" xlink:title="ifrs-full_CashAndCashEquivalents_terseLabel"/>
        <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentAssets_terseLabel" xlink:title="ifrs-full_CurrentAssets_terseLabel to ifrs-full_CashAndCashEquivalents_terseLabel" xlink:to="ifrs-full_CashAndCashEquivalents_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentLoansReceivedAndCurrentPortionOfNoncurrentLoansReceived" xlink:label="ifrs-full_CurrentLoansReceivedAndCurrentPortionOfNoncurrentLoansReceived_terseLabel" xlink:title="ifrs-full_CurrentLoansReceivedAndCurrentPortionOfNoncurrentLoansReceived_terseLabel"/>
        <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel to ifrs-full_CurrentLoansReceivedAndCurrentPortionOfNoncurrentLoansReceived_terseLabel" xlink:to="ifrs-full_CurrentLoansReceivedAndCurrentPortionOfNoncurrentLoansReceived_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IssuedCapital" xlink:label="ifrs-full_IssuedCapital_terseLabel" xlink:title="ifrs-full_IssuedCapital_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel to ifrs-full_IssuedCapital_terseLabel" xlink:to="ifrs-full_IssuedCapital_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CurrentBondsIssuedAndCurrentPortionOfNoncurrentBondsIssued" xlink:label="ifrs-full_CurrentBondsIssuedAndCurrentPortionOfNoncurrentBondsIssued_terseLabel" xlink:title="ifrs-full_CurrentBondsIssuedAndCurrentPortionOfNoncurrentBondsIssued_terseLabel"/>
        <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CurrentLiabilities_terseLabel" xlink:title="ifrs-full_CurrentLiabilities_terseLabel to ifrs-full_CurrentBondsIssuedAndCurrentPortionOfNoncurrentBondsIssued_terseLabel" xlink:to="ifrs-full_CurrentBondsIssuedAndCurrentPortionOfNoncurrentBondsIssued_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RetainedEarnings" xlink:label="ifrs-full_RetainedEarnings_terseLabel" xlink:title="ifrs-full_RetainedEarnings_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel to ifrs-full_RetainedEarnings_terseLabel" xlink:to="ifrs-full_RetainedEarnings_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_SharePremium" xlink:label="ifrs-full_SharePremium_terseLabel" xlink:title="ifrs-full_SharePremium_terseLabel"/>
        <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel to ifrs-full_SharePremium_terseLabel" xlink:to="ifrs-full_SharePremium_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod" xlink:label="ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod_terseLabel" xlink:title="ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod_terseLabel"/>
        <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_NoncurrentAssets_terseLabel" xlink:title="ifrs-full_NoncurrentAssets_terseLabel to ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod_terseLabel" xlink:to="ifrs-full_InvestmentsInAssociatesAccountedForUsingEquityMethod_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherReserves" xlink:label="ifrs-full_OtherReserves_terseLabel" xlink:title="ifrs-full_OtherReserves_terseLabel"/>
        <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel to ifrs-full_OtherReserves_terseLabel" xlink:to="ifrs-full_OtherReserves_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_NoncontrollingInterests" xlink:label="ifrs-full_NoncontrollingInterests_terseLabel" xlink:title="ifrs-full_NoncontrollingInterests_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_Equity_terseLabel" xlink:title="ifrs-full_Equity_terseLabel to ifrs-full_NoncontrollingInterests_terseLabel" xlink:to="ifrs-full_NoncontrollingInterests_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslation" xlink:label="ifrs-full_ReserveOfExchangeDifferencesOnTranslation_terseLabel" xlink:title="ifrs-full_ReserveOfExchangeDifferencesOnTranslation_terseLabel"/>
        <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel" xlink:title="ifrs-full_EquityAttributableToOwnersOfParent_terseLabel to ifrs-full_ReserveOfExchangeDifferencesOnTranslation_terseLabel" xlink:to="ifrs-full_ReserveOfExchangeDifferencesOnTranslation_terseLabel" xlink:type="arc"/>
    </link:calculationLink>
    <link:calculationLink xlink:role="http://www.esma.europa.eu/xbrl/role/all/ias_1_role-320000" xlink:type="extended">
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss_terseLabel" xlink:title="ifrs-full_ProfitLoss_terseLabel"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLossBeforeTax" xlink:label="ifrs-full_ProfitLossBeforeTax_terseLabel" xlink:title="ifrs-full_ProfitLossBeforeTax_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLoss_terseLabel" xlink:title="ifrs-full_ProfitLoss_terseLabel to ifrs-full_ProfitLossBeforeTax_terseLabel" xlink:to="ifrs-full_ProfitLossBeforeTax_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLossFromOperatingActivities" xlink:label="ifrs-full_ProfitLossFromOperatingActivities_terseLabel" xlink:title="ifrs-full_ProfitLossFromOperatingActivities_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax_terseLabel" xlink:title="ifrs-full_ProfitLossBeforeTax_terseLabel to ifrs-full_ProfitLossFromOperatingActivities_terseLabel" xlink:to="ifrs-full_ProfitLossFromOperatingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RevenueAndOperatingIncome" xlink:label="ifrs-full_RevenueAndOperatingIncome_terseLabel" xlink:title="ifrs-full_RevenueAndOperatingIncome_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossFromOperatingActivities_terseLabel" xlink:title="ifrs-full_ProfitLossFromOperatingActivities_terseLabel to ifrs-full_RevenueAndOperatingIncome_terseLabel" xlink:to="ifrs-full_RevenueAndOperatingIncome_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ExpenseByNature" xlink:label="ifrs-full_ExpenseByNature_terseLabel" xlink:title="ifrs-full_ExpenseByNature_terseLabel"/>
        <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossFromOperatingActivities_terseLabel" xlink:title="ifrs-full_ProfitLossFromOperatingActivities_terseLabel to ifrs-full_ExpenseByNature_terseLabel" xlink:to="ifrs-full_ExpenseByNature_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdditionalProvisionsOtherProvisions" xlink:label="ifrs-full_AdditionalProvisionsOtherProvisions_terseLabel" xlink:title="ifrs-full_AdditionalProvisionsOtherProvisions_terseLabel"/>
        <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ExpenseByNature_terseLabel" xlink:title="ifrs-full_ExpenseByNature_terseLabel to ifrs-full_AdditionalProvisionsOtherProvisions_terseLabel" xlink:to="ifrs-full_AdditionalProvisionsOtherProvisions_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_FinanceIncome" xlink:label="ifrs-full_FinanceIncome_terseLabel" xlink:title="ifrs-full_FinanceIncome_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax_terseLabel" xlink:title="ifrs-full_ProfitLossBeforeTax_terseLabel to ifrs-full_FinanceIncome_terseLabel" xlink:to="ifrs-full_FinanceIncome_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_FinanceCosts" xlink:label="ifrs-full_FinanceCosts_terseLabel" xlink:title="ifrs-full_FinanceCosts_terseLabel"/>
        <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax_terseLabel" xlink:title="ifrs-full_ProfitLossBeforeTax_terseLabel to ifrs-full_FinanceCosts_terseLabel" xlink:to="ifrs-full_FinanceCosts_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod" xlink:label="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod_terseLabel" xlink:title="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax_terseLabel" xlink:title="ifrs-full_ProfitLossBeforeTax_terseLabel to ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod_terseLabel" xlink:to="ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss" xlink:label="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_terseLabel" xlink:title="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_terseLabel"/>
        <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLossBeforeTax_terseLabel" xlink:title="ifrs-full_ProfitLossBeforeTax_terseLabel to ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_terseLabel" xlink:to="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations" xlink:label="ifrs-full_IncomeTaxExpenseContinuingOperations_terseLabel" xlink:title="ifrs-full_IncomeTaxExpenseContinuingOperations_terseLabel"/>
        <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLoss_terseLabel" xlink:title="ifrs-full_ProfitLoss_terseLabel to ifrs-full_IncomeTaxExpenseContinuingOperations_terseLabel" xlink:to="ifrs-full_IncomeTaxExpenseContinuingOperations_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLossFromDiscontinuedOperations" xlink:label="ifrs-full_ProfitLossFromDiscontinuedOperations_terseLabel" xlink:title="ifrs-full_ProfitLossFromDiscontinuedOperations_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ProfitLoss_terseLabel" xlink:title="ifrs-full_ProfitLoss_terseLabel to ifrs-full_ProfitLossFromDiscontinuedOperations_terseLabel" xlink:to="ifrs-full_ProfitLossFromDiscontinuedOperations_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_Revenue" xlink:label="ifrs-full_Revenue_terseLabel" xlink:title="ifrs-full_Revenue_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_RevenueAndOperatingIncome_terseLabel" xlink:title="ifrs-full_RevenueAndOperatingIncome_terseLabel to ifrs-full_Revenue_terseLabel" xlink:to="ifrs-full_Revenue_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherIncome" xlink:label="ifrs-full_OtherIncome_terseLabel" xlink:title="ifrs-full_OtherIncome_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_RevenueAndOperatingIncome_terseLabel" xlink:title="ifrs-full_RevenueAndOperatingIncome_terseLabel to ifrs-full_OtherIncome_terseLabel" xlink:to="ifrs-full_OtherIncome_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress" xlink:label="ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress_terseLabel" xlink:title="ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ExpenseByNature_terseLabel" xlink:title="ifrs-full_ExpenseByNature_terseLabel to ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress_terseLabel" xlink:to="ifrs-full_ChangesInInventoriesOfFinishedGoodsAndWorkInProgress_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#wiit_ServicesExpenseAndRawMaterialsAndConsumables" xlink:label="wiit_ServicesExpenseAndRawMaterialsAndConsumables" xlink:title="wiit_ServicesExpenseAndRawMaterialsAndConsumables"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ExpenseByNature_terseLabel" xlink:title="ifrs-full_ExpenseByNature_terseLabel to wiit_ServicesExpenseAndRawMaterialsAndConsumables" xlink:to="wiit_ServicesExpenseAndRawMaterialsAndConsumables" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_EmployeeBenefitsExpense" xlink:label="ifrs-full_EmployeeBenefitsExpense_terseLabel" xlink:title="ifrs-full_EmployeeBenefitsExpense_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ExpenseByNature_terseLabel" xlink:title="ifrs-full_ExpenseByNature_terseLabel to ifrs-full_EmployeeBenefitsExpense_terseLabel" xlink:to="ifrs-full_EmployeeBenefitsExpense_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DepreciationAndAmortisationExpense" xlink:label="ifrs-full_DepreciationAndAmortisationExpense_terseLabel" xlink:title="ifrs-full_DepreciationAndAmortisationExpense_terseLabel"/>
        <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ExpenseByNature_terseLabel" xlink:title="ifrs-full_ExpenseByNature_terseLabel to ifrs-full_DepreciationAndAmortisationExpense_terseLabel" xlink:to="ifrs-full_DepreciationAndAmortisationExpense_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherExpenseByNature" xlink:label="ifrs-full_OtherExpenseByNature_terseLabel" xlink:title="ifrs-full_OtherExpenseByNature_terseLabel"/>
        <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ExpenseByNature_terseLabel" xlink:title="ifrs-full_ExpenseByNature_terseLabel to ifrs-full_OtherExpenseByNature_terseLabel" xlink:to="ifrs-full_OtherExpenseByNature_terseLabel" xlink:type="arc"/>
    </link:calculationLink>
    <link:calculationLink xlink:role="http://www.esma.europa.eu/xbrl/role/all/ias_1_role-410000" xlink:type="extended">
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome_terseLabel" xlink:title="ifrs-full_ComprehensiveIncome_terseLabel"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss_totalLabel" xlink:title="ifrs-full_ProfitLoss_totalLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ComprehensiveIncome_terseLabel" xlink:title="ifrs-full_ComprehensiveIncome_terseLabel to ifrs-full_ProfitLoss_totalLabel" xlink:to="ifrs-full_ProfitLoss_totalLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ComprehensiveIncome_terseLabel" xlink:title="ifrs-full_ComprehensiveIncome_terseLabel to ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:to="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax" xlink:label="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_terseLabel" xlink:title="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel to ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_terseLabel" xlink:to="ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationBeforeTax_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax" xlink:label="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ComprehensiveIncome_terseLabel" xlink:title="ifrs-full_ComprehensiveIncome_terseLabel to ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:to="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss" xlink:label="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss_terseLabel" xlink:title="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss_terseLabel"/>
        <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_terseLabel to ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss_terseLabel" xlink:to="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss" xlink:label="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss_terseLabel" xlink:title="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss_terseLabel"/>
        <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel to ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss_terseLabel" xlink:to="ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLoss_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTax_terseLabel to ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_terseLabel" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges" xlink:label="ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax_terseLabel to ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges_terseLabel" xlink:to="ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges_terseLabel" xlink:type="arc"/>
    </link:calculationLink>
    <link:calculationLink xlink:role="http://www.esma.europa.eu/xbrl/role/all/ias_7_role-520000" xlink:type="extended">
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseInCashAndCashEquivalents" xlink:label="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_terseLabel" xlink:title="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_terseLabel"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_terseLabel" xlink:title="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_terseLabel to ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:to="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_terseLabel" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_terseLabel" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAccountReceivable_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#wiit_AdjustmentsForIncreaseDecreaseInAssetsDerivingFromContracts" xlink:label="wiit_AdjustmentsForIncreaseDecreaseInAssetsDerivingFromContracts" xlink:title="wiit_AdjustmentsForIncreaseDecreaseInAssetsDerivingFromContracts"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to wiit_AdjustmentsForIncreaseDecreaseInAssetsDerivingFromContracts" xlink:to="wiit_AdjustmentsForIncreaseDecreaseInAssetsDerivingFromContracts" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#wiit_AdjustmentsForIncreaseDecreaseInLiabilitiesDerivingFromContracts" xlink:label="wiit_AdjustmentsForIncreaseDecreaseInLiabilitiesDerivingFromContracts" xlink:title="wiit_AdjustmentsForIncreaseDecreaseInLiabilitiesDerivingFromContracts"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to wiit_AdjustmentsForIncreaseDecreaseInLiabilitiesDerivingFromContracts" xlink:to="wiit_AdjustmentsForIncreaseDecreaseInLiabilitiesDerivingFromContracts" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable_terseLabel" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable_terseLabel" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAccountPayable_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital" xlink:label="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel"/>
        <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:to="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForProvisions" xlink:label="ifrs-full_AdjustmentsForProvisions_terseLabel" xlink:title="ifrs-full_AdjustmentsForProvisions_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel to ifrs-full_AdjustmentsForProvisions_terseLabel" xlink:to="ifrs-full_AdjustmentsForProvisions_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherAdjustmentsForNoncashItems" xlink:label="ifrs-full_OtherAdjustmentsForNoncashItems_terseLabel" xlink:title="ifrs-full_OtherAdjustmentsForNoncashItems_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel to ifrs-full_OtherAdjustmentsForNoncashItems_terseLabel" xlink:to="ifrs-full_OtherAdjustmentsForNoncashItems_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_InterestPaidClassifiedAsOperatingActivities" xlink:label="ifrs-full_InterestPaidClassifiedAsOperatingActivities_terseLabel" xlink:title="ifrs-full_InterestPaidClassifiedAsOperatingActivities_terseLabel"/>
        <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_InterestPaidClassifiedAsOperatingActivities_terseLabel" xlink:to="ifrs-full_InterestPaidClassifiedAsOperatingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets_terseLabel" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets_terseLabel"/>
        <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets_terseLabel" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities_terseLabel" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities_terseLabel"/>
        <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities_terseLabel" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets_terseLabel" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets_terseLabel"/>
        <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets_terseLabel" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities_terseLabel" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities_terseLabel"/>
        <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities_terseLabel" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities" xlink:label="ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities_terseLabel" xlink:title="ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel to ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities_terseLabel" xlink:to="ifrs-full_AdjustmentsForIncreaseDecreaseInEmployeeBenefitLiabilities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_terseLabel" xlink:title="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_terseLabel to ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel" xlink:to="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities" xlink:label="ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_terseLabel"/>
        <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel to ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_terseLabel" xlink:to="ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_terseLabel" xlink:title="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_terseLabel"/>
        <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel to ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_terseLabel" xlink:to="ifrs-full_PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities" xlink:label="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities_terseLabel" xlink:title="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities_terseLabel"/>
        <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel to ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities_terseLabel" xlink:to="ifrs-full_PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLossFromContinuingOperations" xlink:label="ifrs-full_ProfitLossFromContinuingOperations_terseLabel" xlink:title="ifrs-full_ProfitLossFromContinuingOperations_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel to ifrs-full_ProfitLossFromContinuingOperations_terseLabel" xlink:to="ifrs-full_ProfitLossFromContinuingOperations_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivities" xlink:label="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel"/>
        <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_terseLabel" xlink:title="ifrs-full_IncreaseDecreaseInCashAndCashEquivalents_terseLabel to ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:to="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProceedsFromNoncurrentBorrowings" xlink:label="ifrs-full_ProceedsFromNoncurrentBorrowings_terseLabel" xlink:title="ifrs-full_ProceedsFromNoncurrentBorrowings_terseLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel to ifrs-full_ProceedsFromNoncurrentBorrowings_terseLabel" xlink:to="ifrs-full_ProceedsFromNoncurrentBorrowings_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss" xlink:label="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_terseLabel" xlink:title="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_terseLabel"/>
        <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel to ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_terseLabel" xlink:to="ifrs-full_AdjustmentsForDepreciationAndAmortisationExpenseAndImpairmentLossReversalOfImpairmentLossRecognisedInProfitOrLoss_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures" xlink:label="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures_terseLabel" xlink:title="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel to ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures_terseLabel" xlink:to="ifrs-full_ProceedsFromIssueOfBondsNotesAndDebentures_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities" xlink:label="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities_terseLabel" xlink:title="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInInvestingActivities_terseLabel to ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities_terseLabel" xlink:to="ifrs-full_OtherInflowsOutflowsOfCashClassifiedAsInvestingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries" xlink:label="ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries_terseLabel" xlink:title="ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries_terseLabel"/>
        <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel to ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries_terseLabel" xlink:to="ifrs-full_PaymentsFromChangesInOwnershipInterestsInSubsidiaries_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProceedsFromIssuingShares" xlink:label="ifrs-full_ProceedsFromIssuingShares_terseLabel" xlink:title="ifrs-full_ProceedsFromIssuingShares_terseLabel"/>
        <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel to ifrs-full_ProceedsFromIssuingShares_terseLabel" xlink:to="ifrs-full_ProceedsFromIssuingShares_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PaymentsToAcquireOrRedeemEntitysShares" xlink:label="ifrs-full_PaymentsToAcquireOrRedeemEntitysShares_terseLabel" xlink:title="ifrs-full_PaymentsToAcquireOrRedeemEntitysShares_terseLabel"/>
        <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel to ifrs-full_PaymentsToAcquireOrRedeemEntitysShares_terseLabel" xlink:to="ifrs-full_PaymentsToAcquireOrRedeemEntitysShares_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncomeTaxesPaidClassifiedAsOperatingActivities" xlink:label="ifrs-full_IncomeTaxesPaidClassifiedAsOperatingActivities_terseLabel" xlink:title="ifrs-full_IncomeTaxesPaidClassifiedAsOperatingActivities_terseLabel"/>
        <link:calculationArc order="11" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_IncomeTaxesPaidClassifiedAsOperatingActivities_terseLabel" xlink:to="ifrs-full_IncomeTaxesPaidClassifiedAsOperatingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:label="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_terseLabel" xlink:title="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_terseLabel"/>
        <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel to ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_terseLabel" xlink:to="ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities" xlink:label="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_terseLabel" xlink:title="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_terseLabel"/>
        <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel to ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_terseLabel" xlink:to="ifrs-full_PaymentsOfLeaseLiabilitiesClassifiedAsFinancingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_DividendsPaidClassifiedAsFinancingActivities" xlink:label="ifrs-full_DividendsPaidClassifiedAsFinancingActivities_terseLabel" xlink:title="ifrs-full_DividendsPaidClassifiedAsFinancingActivities_terseLabel"/>
        <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInFinancingActivities_terseLabel to ifrs-full_DividendsPaidClassifiedAsFinancingActivities_terseLabel" xlink:to="ifrs-full_DividendsPaidClassifiedAsFinancingActivities_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#wiit_AdjustmentsForFinancialAssets" xlink:label="wiit_AdjustmentsForFinancialAssets" xlink:title="wiit_AdjustmentsForFinancialAssets"/>
        <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel to wiit_AdjustmentsForFinancialAssets" xlink:to="wiit_AdjustmentsForFinancialAssets" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForIncomeTaxExpense" xlink:label="ifrs-full_AdjustmentsForIncomeTaxExpense_terseLabel" xlink:title="ifrs-full_AdjustmentsForIncomeTaxExpense_terseLabel"/>
        <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel to ifrs-full_AdjustmentsForIncomeTaxExpense_terseLabel" xlink:to="ifrs-full_AdjustmentsForIncomeTaxExpense_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForFinanceCosts" xlink:label="ifrs-full_AdjustmentsForFinanceCosts_terseLabel" xlink:title="ifrs-full_AdjustmentsForFinanceCosts_terseLabel"/>
        <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital_terseLabel to ifrs-full_AdjustmentsForFinanceCosts_terseLabel" xlink:to="ifrs-full_AdjustmentsForFinanceCosts_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:label="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_terseLabel" xlink:title="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_terseLabel"/>
        <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_terseLabel" xlink:to="ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="815600AB2BDB42BC0E81-2021-12-31.xsd#wiit_AdjustmentsForIncreaseDecreaseInTaxCreditsAndPayables" xlink:label="wiit_AdjustmentsForIncreaseDecreaseInTaxCreditsAndPayables" xlink:title="wiit_AdjustmentsForIncreaseDecreaseInTaxCreditsAndPayables"/>
        <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel" xlink:title="ifrs-full_CashFlowsFromUsedInOperatingActivities_terseLabel to wiit_AdjustmentsForIncreaseDecreaseInTaxCreditsAndPayables" xlink:to="wiit_AdjustmentsForIncreaseDecreaseInTaxCreditsAndPayables" xlink:type="arc"/>
    </link:calculationLink>
    <link:calculationLink xlink:role="http://www.esma.europa.eu/xbrl/role/all/ias_1_role-610000" xlink:type="extended">
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ComprehensiveIncome" xlink:label="ifrs-full_ComprehensiveIncome_totalLabel" xlink:title="ifrs-full_ComprehensiveIncome_totalLabel"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_ProfitLoss" xlink:label="ifrs-full_ProfitLoss_periodEndLabel" xlink:title="ifrs-full_ProfitLoss_periodEndLabel"/>
        <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ComprehensiveIncome_totalLabel" xlink:title="ifrs-full_ComprehensiveIncome_totalLabel to ifrs-full_ProfitLoss_periodEndLabel" xlink:to="ifrs-full_ProfitLoss_periodEndLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_OtherComprehensiveIncome" xlink:label="ifrs-full_OtherComprehensiveIncome_terseLabel" xlink:title="ifrs-full_OtherComprehensiveIncome_terseLabel"/>
        <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="ifrs-full_ComprehensiveIncome_totalLabel" xlink:title="ifrs-full_ComprehensiveIncome_totalLabel to ifrs-full_OtherComprehensiveIncome_terseLabel" xlink:to="ifrs-full_OtherComprehensiveIncome_terseLabel" xlink:type="arc"/>
        <link:loc xlink:type="locator" xlink:href="http://xbrl.ifrs.org/taxonomy/2020-03-16/full_ifrs/full_ifrs-cor_2020-03-16.xsd#ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:label="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity_terseLabel" xlink:title="ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity_terseLabel"/>
    </link:calculationLink>
</link:linkbase>
