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  <xs:element id="atk_ScheduleofSupplementalCashFlowInformationRelatedtoLeasesTableTextBlock" abstract="false" name="ScheduleofSupplementalCashFlowInformationRelatedtoLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="atk_ExercisePriceRangeFrom3512To4088Member" abstract="true" name="ExercisePriceRangeFrom3512To4088Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atk_Financingcashflowfromfinanceleases" abstract="false" name="Financingcashflowfromfinanceleases" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="atk_AtkinsDomain" abstract="true" name="AtkinsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atk_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseTransactionCostsPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseTransactionCostsPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="atk_TransactionAdvisoryMember" abstract="true" name="TransactionAdvisoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="atk_ObsoleteInventoryReservationPercentWithinThreeMonthsFromExpiration" abstract="false" name="ObsoleteInventoryReservationPercentWithinThreeMonthsFromExpiration" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="atk_ObsoleteInventoryReservationPercentFourToSixMonthsFromExpiration" abstract="false" name="ObsoleteInventoryReservationPercentFourToSixMonthsFromExpiration" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="atk_LeaseassetsandliabilitiesTableTextBlock" abstract="false" name="LeaseassetsandliabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
</xs:schema>
