@utilities.remove_null_proxy_kwarg<EOL><INDENT>def get_assessment_offered_bank_session(self):<DEDENT>
if not self.supports_assessment_offered_bank():<EOL><INDENT>raise errors.Unimplemented()<EOL><DEDENT>return sessions.AssessmentOfferedBankSession(runtime=self._runtime)<EOL>
Gets the session for retrieving offered assessments to bank mappings.

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