@abc.abstractmethod<EOL><INDENT>def get_authorization_notification_session(self, authorization_receiver):<DEDENT>
return<EOL>
Gets the notification session for notifications pertaining to authorization changes.

        :param authorization_receiver: the authorization receiver
        :type authorization_receiver: ``osid.authorization.AuthorizationReceiver``
        :return: an ``AuthorizationNotificationSession``
        :rtype: ``osid.authorization.AuthorizationNotificationSession``
        :raise: ``NullArgument`` -- ``authorization_receiver`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_authorization_notification()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_authorization_notification()`` is ``true``.*