@abc.abstractmethod<EOL><INDENT>def register_for_changed_grade_entries_for_gradebook_column(self, gradebook_column_id):<DEDENT>
pass<EOL>
Registers for notification of an updated grade entry for the specified gradebook column.

        ``GradeEntryReceiver.changedGradeEntries()`` is invoked when an
        entry for the column is updated.

        :param gradebook_column_id: the ``Id`` of the ``GradebookColumn`` to monitor
        :type gradebook_column_id: ``osid.id.Id``
        :raise: ``NullArgument`` -- ``gradebook_column_id is null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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