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  <xs:element name="PercentageOfCommonStokOutstanding" type="dtr:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="chga_PercentageOfCommonStokOutstanding"/>
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  <xs:element name="UnsecuredBridgeNoteMember" type="dtr:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="chga_UnsecuredBridgeNoteMember"/>
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  <xs:element name="NotePayableNetLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="chga_NotePayableNetLineItems"/>
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