@abc.abstractmethod<EOL><INDENT>def get_grade_entries_by_genus_type(self, grade_entry_genus_type):<DEDENT>
return<EOL>
Gets a ``GradeEntryList`` corresponding to the given grade entry genus ``Type`` which does not include grade entries of genus types derived from the specified ``Type``.

        :param grade_entry_genus_type: a grade entry genus type
        :type grade_entry_genus_type: ``osid.type.Type``
        :return: the returned ``GradeEntry`` list
        :rtype: ``osid.grading.GradeEntryList``
        :raise: ``NullArgument`` -- ``grade_entry_genus_type`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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