@abc.abstractmethod<EOL><INDENT>def register_for_changed_catalogs(self):<DEDENT>
pass<EOL>
Registers for notification of updated catalogs.

        ``CatalogReceiver.changedCatalogs()`` is invoked when a catalog
        is changed.

        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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