code: def transfer_extensions_for_identities(self, identity_mapping):
          
          content = self._serialize.body(identity_mapping, '[IdentityMapping]')
          self._send(http_method='POST',
                     location_id='da46fe26-dbb6-41d9-9d6b-86bf47e4e444',
                     version='5.1-preview.1',
                     content=content)
docs: TransferExtensionsForIdentities.
          [Preview API] This method transfers extensions for the given identities.
          :param [IdentityMapping] identity_mapping: The identity mapping.