def get_gradebook_column_notification_session_for_gradebook(self, gradebook_column_receiver=None, gradebook_id=None):
if gradebook_column_receiver is None:<EOL><INDENT>raise NullArgument<EOL><DEDENT>if gradebook_id is None:<EOL><INDENT>raise NullArgument<EOL><DEDENT>raise Unimplemented()<EOL>
Gets the ``OsidSession`` associated with the gradebook column notification service for the given gradebook.

        arg:    gradebook_column_receiver
                (osid.grading.GradebookColumnReceiver): the gradebook
                column receiver
        arg:    gradebook_id (osid.id.Id): the ``Id`` of the gradebook
        return: (osid.grading.GradebookColumnNotificationSession) - ``a
                _gradebook_column_notification_session``
        raise:  NotFound - ``gradebook_id`` not found
        raise:  NullArgument - ``gradebook_column_receiver`` or
                ``gradebook_id`` is ``null``
        raise:  OperationFailed - ``unable to complete request``
        raise:  Unimplemented -
                ``supports_gradebook_column_notification()`` or
                ``supports_visible_federation()`` is ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_gradebook_column_notification()`` and
        ``supports_visible_federation()`` are ``true``.*