@property<EOL><INDENT>def upc(self):<DEDENT>
return self._upc<EOL>
Gets the upc of this CatalogItemVariation.
The item variation's UPC, if any. Searchable in the Connect API. This field is only exposed in the Connect API. It is not exposed in Square's Dashboard, Square Point of Sale app or Retail Point of Sale app.

:return: The upc of this CatalogItemVariation.
:rtype: str