@abc.abstractmethod<EOL><INDENT>def apply_relationship_query(self, relationship_query):<DEDENT>
pass<EOL>
Applies a relationship query to this family.

        :param relationship_query: the relationship query
        :type relationship_query: ``osid.relationship.RelationshipQuery``
        :raise: ``NullArgument`` -- ``relationship_query`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure occurred
        :raise: ``Unsupported`` -- ``relationship_query`` not of this service

        *compliance: mandatory -- This method must be implemented.*