def get_grading_agent_id(self):
if not self.is_graded or self.is_derived():<EOL><INDENT>raise errors.IllegalState()<EOL><DEDENT>return Id(self._my_map['<STR_LIT>'])<EOL>
Gets the ``Id`` of the ``Agent`` that created this entry.

        return: (osid.id.Id) - the ``Id`` of the ``Agent``
        raise:  IllegalState - ``is_graded()`` is ``false`` or
                ``is_derived()`` is ``true``
        *compliance: mandatory -- This method must be implemented.*