def get_composition_notification_session_for_repository(self, composition_receiver=None, repository_id=None):
if composition_receiver is None:<EOL><INDENT>raise NullArgument<EOL><DEDENT>if repository_id is None:<EOL><INDENT>raise NullArgument<EOL><DEDENT>raise Unimplemented()<EOL>
Gets the composition notification session for the given repository.

        arg:    composition_receiver
                (osid.repository.CompositionReceiver): the notification
                callback
        arg:    repository_id (osid.id.Id): the ``Id`` of the repository
        return: (osid.repository.CompositionNotificationSession) - a
                ``CompositionNotificationSession``
        raise:  NotFound - ``repository_id`` not found
        raise:  NullArgument - ``composition_receiver`` or
                ``repository_id`` is ``null``
        raise:  OperationFailed - ``unable to complete request``
        raise:  Unimplemented - ``supports_composition_notification()``
                or ``supports_visible_federation()`` is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_composition_notfication()`` and
        ``supports_visible_federation()`` are ``true``.*