@abc.abstractmethod<EOL><INDENT>def register_for_deleted_hierarchy_node(self, node_id):<DEDENT>
pass<EOL>
Registers for notification of a deleted hierarchy node.

        ``HierarchyStructureReceiver.deletedNodes()`` is invoked when
        the specified hierarchy node is deleted.

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

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