@utilities.remove_null_proxy_kwarg<EOL><INDENT>def get_assessment_results_session(self):<DEDENT>
if not self.supports_assessment_results():<EOL><INDENT>raise errors.Unimplemented()<EOL><DEDENT>return sessions.AssessmentResultsSession(runtime=self._runtime)<EOL>
Gets an ``AssessmentResultsSession`` to retrieve assessment results.

        return: (osid.assessment.AssessmentResultsSession) - an
                assessment results session for this service
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_assessment_results()`` is
                ``false``
        *compliance: optional -- This method must be implemented if
        ``supports_assessment_results()`` is ``true``.*