def register_for_new_family_descendants(self, family_id=None):
pass<EOL>
Registers for notification of an updated hierarchy structure that introduces
            a new descendant of the specified family.

        ``FamilyReceiver.newDescendantFamily()`` is invoked when the
        specified family node gets a new descendant.

        arg:    family_id (osid.id.Id): the ``Id`` of the ``Family``
                node to monitor
        raise:  NullArgument - ``family_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*