def get_assessment_authoring_proxy_manager(self):
if proxy is None:<EOL><INDENT>raise NullArgument()<EOL><DEDENT>raise Unimplemented()<EOL>
Gets an ``AssessmentAuthoringProxyManager``.

        return:
                (osid.assessment.authoring.AssessmentAuthoringProxyManag
                er) - an ``AssessmentAuthoringProxyManager``
        raise:  OperationFailed - unable to complete request
        raise:  Unimplemented - ``supports_assessment_authoring() is
                false``
        *compliance: optional -- This method must be implemented if
        ``supports_assessment_authoring()`` is true.*