#NEWLINE# def _add_partial_key_entity_pb( self ) : #NEWLINE# #INDENT# 'Adds a new mutation for an entity with a partial key.\n\n        :rtype: :class:`gcloud.datastore._generated.entity_pb2.Entity`\n        :returns: The newly created entity protobuf that will be\n                  updated and sent with a commit.\n        ' #NEWLINE# new_mutation = self . mutations . add ( ) #NEWLINE# return new_mutation . insert