docs: def get_grade_entry_admin_session(self):
          """Gets the ``OsidSession`` associated with the grade entry administration service.
  
          return: (osid.grading.GradeEntryAdminSession) - a
                  ``GradeEntryAdminSession``
          raise:  OperationFailed - unable to complete request
          raise:  Unimplemented - ``supports_grade_entry_admin()`` is
                  ``false``
          *compliance: optional -- This method must be implemented if
          ``supports_grade_entry_admin()`` is ``true``.*
  
          """
          if not self.supports_grade_entry_admin():
              raise errors.Unimplemented()
          # pylint: disable=no-member
          return sessions.GradeEntryAdminSession(runtime=self._runtime)