@abc.abstractmethod<EOL><INDENT>def register_for_changed_family(self, family_id):<DEDENT>
pass<EOL>
Registers for notification of an updated family.

        ``FamilyReceiver.changedFamilies()`` is invoked when the
        specified family is changed.

        :param family_id: the ``Id`` of the ``Family`` to monitor
        :type family_id: ``osid.id.Id``
        :raise: ``NullArgument`` -- ``family_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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