@abc.abstractmethod<EOL><INDENT>def get_assessment_taken_admin_session(self):<DEDENT>
return<EOL>
Gets the ``OsidSession`` associated with the assessment taken administration service.

        :return: an ``AssessmentTakenAdminSession``
        :rtype: ``osid.assessment.AssessmentTakenAdminSession``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``Unimplemented`` -- ``supports_assessment_taken_admin()`` is ``false``

        *compliance: optional -- This method must be implemented if
        ``supports_assessment_taken_admin()`` is ``true``.*