@abc.abstractmethod<EOL><INDENT>def get_overridden_calculated_entry(self):<DEDENT>
return<EOL>
Gets the calculated entry this entry overrides.

        :return: the calculated entry
        :rtype: ``osid.grading.GradeEntry``
        :raise: ``IllegalState`` -- ``overrides_calculated_entry()`` is ``false``
        :raise: ``OperationFailed`` -- unable to complete request

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