@abc.abstractmethod<EOL><INDENT>def register_for_changed_configuration_hierarchy_for_descendants(self, configuration_id):<DEDENT>
pass<EOL>
Registers for notification of an updated configuration hierarchy structure.

        ``ConfigurationReceiver.changedChildOfConfigurations()`` is
        invoked when the specified node or any of its descendants
        experiences a change in its children.

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

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