@utilities.arguments_not_none<EOL><INDENT>def get_grade_systems_by_gradebook(self, gradebook_id):<DEDENT>
<EOL>mgr = self._get_provider_manager('<STR_LIT>', local=True)<EOL>lookup_session = mgr.get_grade_system_lookup_session_for_gradebook(gradebook_id, proxy=self._proxy)<EOL>lookup_session.use_isolated_gradebook_view()<EOL>return lookup_session.get_grade_systems()<EOL>
Gets the list of grade systems associated with a ``Gradebook``.

        arg:    gradebook_id (osid.id.Id): ``Id`` of the ``Gradebook``
        return: (osid.grading.GradeSystemList) - list of related grade
                systems
        raise:  NotFound - ``gradebook_id`` is not found
        raise:  NullArgument - ``gradebook_id`` is ``null``
        raise:  OperationFailed - unable to complete request
        raise:  PermissionDenied - authorization failure
        *compliance: mandatory -- This method must be implemented.*