@abc.abstractmethod<EOL><INDENT>def apply_grade_system_sequencing(self, grade_system_search_order):<DEDENT>
pass<EOL>
Applies a grade system search order to this gradebook.

        :param grade_system_search_order: the grade system search order
        :type grade_system_search_order: ``osid.grading.GradeSystemSearchOrder``
        :raise: ``NullArgument`` -- ``grade_system_search_order`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure occurred
        :raise: ``Unsupported`` -- ``grade_system_search_order`` not of this service

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