@abc.abstractmethod<EOL><INDENT>def get_grade_entries_by_query(self, grade_entry_query):<DEDENT>
return<EOL>
Gets a list of entries matching the given grade entry query.

        :param grade_entry_query: the grade entry query
        :type grade_entry_query: ``osid.grading.GradeEntryQuery``
        :return: the returned ``GradeEntryList``
        :rtype: ``osid.grading.GradeEntryList``
        :raise: ``NullArgument`` -- ``grade_entry_query`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure
        :raise: ``Unsupported`` -- ``grade_entry_query`` is not of this service

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