@utilities.remove_null_proxy_kwarg<EOL><INDENT>def get_objective_objective_bank_session(self):<DEDENT>
if not self.supports_objective_objective_bank():<EOL><INDENT>raise errors.Unimplemented()<EOL><DEDENT>return sessions.ObjectiveObjectiveBankSession(runtime=self._runtime)<EOL>
Gets the session for retrieving objective to objective bank mappings.

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