def get_objective_bank_query_session(self):
raise Unimplemented()<EOL>
Gets the OsidSession associated with the objective bank query service.

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