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  <xs:element id="apg_InvestmentHedgeAmountAmortizedFromAOCIIntoInterestExpenses" abstract="false" name="InvestmentHedgeAmountAmortizedFromAOCIIntoInterestExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OtherComprehensiveIncomeLossFairValueHedgeGainLossBeforeReclassificationAndTax" abstract="false" name="OtherComprehensiveIncomeLossFairValueHedgeGainLossBeforeReclassificationAndTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OtherComprehensiveIncomeLossFairValueHedgeGainLossReclassificationBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossFairValueHedgeGainLossReclassificationBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_LesseeOperatingLeaseNumberOfRenewalOptions" abstract="false" name="LesseeOperatingLeaseNumberOfRenewalOptions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="apg_LesseeOperatingLeaseTermOfContractExtensionOption" abstract="false" name="LesseeOperatingLeaseTermOfContractExtensionOption" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="apg_IncrementalBorrowingRateTenor" abstract="false" name="IncrementalBorrowingRateTenor" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="apg_CashFlowLesseeAbstract" abstract="true" name="CashFlowLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_RightOfUseAssetObtainedInExchangeForLeaseLiabilityAbstract" abstract="true" name="RightOfUseAssetObtainedInExchangeForLeaseLiabilityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract" abstract="true" name="FinanceLeaseAssetsAndLiabilitiesLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_WeightedAverageRemainingLeaseTermAbstract" abstract="true" name="WeightedAverageRemainingLeaseTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_WeightedAverageDiscountRateAbstract" abstract="true" name="WeightedAverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiabilitiesPaymentsDueAbstract" abstract="true" name="OperatingAndFinanceLeaseLiabilitiesPaymentsDueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiabilityToBePaidYearOne" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiabilityToBePaidYearTwo" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiabilityToBePaidYearThree" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiabilityToBePaidYearFour" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiabilityToBePaidYearFive" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiabilityToBePaidAfterYearFive" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaidAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiabilityToBePaid" abstract="false" name="OperatingAndFinanceLeaseLiabilityToBePaid" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount" abstract="false" name="OperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OperatingAndFinanceLeaseLiability" abstract="false" name="OperatingAndFinanceLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OtherObligationsMember" abstract="true" name="OtherObligationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_TwoThousandNineteenTermLoanMember" abstract="true" name="TwoThousandNineteenTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_TwoThousandTwentyTwoIncrementalAmendmentMember" abstract="true" name="TwoThousandTwentyTwoIncrementalAmendmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_AcquisitionOfConstructionEquipmentAndVehiclesMember" abstract="true" name="AcquisitionOfConstructionEquipmentAndVehiclesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_LineOfCreditNetOfLettersOfCreditOutstanding" abstract="false" name="LineOfCreditNetOfLettersOfCreditOutstanding" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_DebtInstrumentReductionInBasisSpreadOnVariableRate" abstract="false" name="DebtInstrumentReductionInBasisSpreadOnVariableRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="apg_UnswappedPortionOfLineOfCredit" abstract="false" name="UnswappedPortionOfLineOfCredit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_EffectiveIncomeTaxRateReconciliationCrossBorderFinancingArrangementOtherAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationCrossBorderFinancingArrangementOtherAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_EffectiveIncomeTaxRateReconciliationTransactionCostsAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationTransactionCostsAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_EffectiveIncomeTaxRateReconciliationCrossBorderFinancingArrangementOtherPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationCrossBorderFinancingArrangementOtherPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="apg_EffectiveIncomeTaxRateReconciliationTransactionCostsPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationTransactionCostsPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="apg_DeferredTaxAssetsOperatingAndFinanceLeaseLiabilities" abstract="false" name="DeferredTaxAssetsOperatingAndFinanceLeaseLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_DeferredTaxAssetsContingentConsiderationAndCompensationLiabilities" abstract="false" name="DeferredTaxAssetsContingentConsiderationAndCompensationLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_DeferredTaxLiabilitiesAmortizationOnIdentifiedIntangibleAssets" abstract="false" name="DeferredTaxLiabilitiesAmortizationOnIdentifiedIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_DeferredTaxLiabilitiesDeferredPayments" abstract="false" name="DeferredTaxLiabilitiesDeferredPayments" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_DeferredTaxLiabilitiesPensionAndPostRetirementObligations" abstract="false" name="DeferredTaxLiabilitiesPensionAndPostRetirementObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_OperatingLossCarrybackTerm" abstract="false" name="OperatingLossCarrybackTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="apg_NetOperatingLossCarryforwardsCarryforwardPeriod" abstract="false" name="NetOperatingLossCarryforwardsCarryforwardPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="apg_MultiemployerPensionPlansMember" abstract="true" name="MultiemployerPensionPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_MaximumValueOfCommonStockPurchasedDuringPeriod" abstract="false" name="MaximumValueOfCommonStockPurchasedDuringPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesIssued" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesIssued" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="apg_DefinedBenefitPlanExpectedFutureBenefitPaymentAfterYearFive" abstract="false" name="DefinedBenefitPlanExpectedFutureBenefitPaymentAfterYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_NationalAutomaticSprinklerIndustryPensionFundMember" abstract="true" name="NationalAutomaticSprinklerIndustryPensionFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_PipeTradesServicesMNPensionFundMember" abstract="true" name="PipeTradesServicesMNPensionFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_SheetMetalWorkersNationalPensionFundMember" abstract="true" name="SheetMetalWorkersNationalPensionFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_HeavyAndGeneralLaborersLocalUnion472And172OfNewJerseyPensionFundMember" abstract="true" name="HeavyAndGeneralLaborersLocalUnion472And172OfNewJerseyPensionFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_BoilermakerBlacksmithNationalPensionTrustMember" abstract="true" name="BoilermakerBlacksmithNationalPensionTrustMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_TotalOtherPensionFundMember" abstract="true" name="TotalOtherPensionFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_MaturityOfCorporateBondUsedInCalculationOfDiscountRateAssumptions" abstract="false" name="MaturityOfCorporateBondUsedInCalculationOfDiscountRateAssumptions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="apg_DefinedBenefitPlanNumberOfPlans" abstract="false" name="DefinedBenefitPlanNumberOfPlans" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="apg_NumberOfCountriesInWhichRetirementPlansSponsored" abstract="false" name="NumberOfCountriesInWhichRetirementPlansSponsored" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="apg_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossGainLossNotYetRecognized" abstract="false" name="DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeLossGainLossNotYetRecognized" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_ProjectedBenefitObligationPboFundedStatusAbstract" abstract="true" name="ProjectedBenefitObligationPboFundedStatusAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_DefinedBenefitPlanNetPeriodicBenefitCostCreditInterestCostStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostCreditInterestCostStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_DefinedBenefitPlanPlanAssetsOther" abstract="false" name="DefinedBenefitPlanPlanAssetsOther" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_DefinedBenefitPlanNetPeriodicBenefitCostCreditExpectedReturnLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostCreditExpectedReturnLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationOfGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" abstract="false" name="DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationOfGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleListNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestCost" abstract="false" name="DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationInterestCost" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="apg_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationServiceCost" abstract="false" name="DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationServiceCost" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="apg_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedLongTermRateOfReturnOnPlanAssets" abstract="false" name="DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationExpectedLongTermRateOfReturnOnPlanAssets" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="apg_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateInterestCost" abstract="false" name="DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateInterestCost" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="apg_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateServiceCost" abstract="false" name="DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRateServiceCost" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="apg_EquitiesAndFixedIncomeSecuritiesMember" abstract="true" name="EquitiesAndFixedIncomeSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_DefinedBenefitPlanGlobalEquityFundsMember" abstract="true" name="DefinedBenefitPlanGlobalEquityFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_DefinedBenefitPlansInsuranceContractsMember" abstract="true" name="DefinedBenefitPlansInsuranceContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_GlobalFixedIncomeAtNetAssetValueMember" abstract="true" name="GlobalFixedIncomeAtNetAssetValueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_PercentageOfOutstandingStockOwnedByRelatedPartyUnderAgreement" abstract="false" name="PercentageOfOutstandingStockOwnedByRelatedPartyUnderAgreement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="apg_DividendsDeclaredShares" abstract="false" name="DividendsDeclaredShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="apg_PublicStockOfferingMember" abstract="true" name="PublicStockOfferingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_PreferredStockDividendRateThresholdConsecutiveTradingDays" abstract="false" name="PreferredStockDividendRateThresholdConsecutiveTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="apg_AnnualDividendSharesPreferredStock" abstract="false" name="AnnualDividendSharesPreferredStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="apg_DividendTenDayTradingPriceThresholdCurrentDividendPrice" abstract="false" name="DividendTenDayTradingPriceThresholdCurrentDividendPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="apg_DividendTenDayTradingPriceThresholdPreviousDividendPrice" abstract="false" name="DividendTenDayTradingPriceThresholdPreviousDividendPrice" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="apg_PreferredStockIndependentRightsNumberOfHoldersTrigger" abstract="false" name="PreferredStockIndependentRightsNumberOfHoldersTrigger" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="apg_ConvertedSharesSharesIssuedAccruedAndUnpaidDividends" abstract="false" name="ConvertedSharesSharesIssuedAccruedAndUnpaidDividends" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="apg_StockRepurchasedDuringPeriodPercentageRepurchasedUponIssuance" abstract="false" name="StockRepurchasedDuringPeriodPercentageRepurchasedUponIssuance" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="apg_TwoThousandAndNineteenEquityIncentivePlanMember" abstract="true" name="TwoThousandAndNineteenEquityIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_NonQualifiedStockOptionsMember" abstract="true" name="NonQualifiedStockOptionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_TimeBasedRestrictedStockUnitsMember" abstract="true" name="TimeBasedRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_PerformanceBasedRestrictedStockUnitsMember" abstract="true" name="PerformanceBasedRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_MarketPerformanceBasedRestrictedStockUnitsMember" abstract="true" name="MarketPerformanceBasedRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_NonExecutiveDirectorsMember" abstract="true" name="NonExecutiveDirectorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfAwardContractualTerm" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardTermsOfAwardContractualTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncreaseDecreaseBasedOnPerformanceExpectations" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncreaseDecreaseBasedOnPerformanceExpectations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVest" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVest" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueIncreaseDecreaseBasedOnPerformanceExpectations" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueIncreaseDecreaseBasedOnPerformanceExpectations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageRemainingContractualTermAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageRemainingContractualTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="apg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageRemainingContractualTerms" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageRemainingContractualTerms" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="apg_PerformanceStockUnitsPsusMember" abstract="true" name="PerformanceStockUnitsPsusMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_IncrementalCommonSharesAttributableToDilutiveEffectOfSharesIssuablePursuantToAnnualPreferredShareDividend" abstract="false" name="IncrementalCommonSharesAttributableToDilutiveEffectOfSharesIssuablePursuantToAnnualPreferredShareDividend" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="apg_OperatingSegmentsExcludingIntersegmentEliminationMember" abstract="true" name="OperatingSegmentsExcludingIntersegmentEliminationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="apg_CorporateAndOtherProfitLoss" abstract="false" name="CorporateAndOtherProfitLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_ContingentConsiderationAndCompensationCosts" abstract="false" name="ContingentConsiderationAndCompensationCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_SystemAndBusinessEnablement" abstract="false" name="SystemAndBusinessEnablement" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_BusinessRelatedCosts" abstract="false" name="BusinessRelatedCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_AcquisitionAndDivestitureRelatedExpenses" abstract="false" name="AcquisitionAndDivestitureRelatedExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="apg_CertaSiteLLCMember" abstract="true" name="CertaSiteLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
