@Override
    public ProducerImpl.OpSendMsg createOpSendMsg() {
        throw new UnsupportedOperationException();
    }
@Test(expectedExceptions = UnsupportedOperationException.class)
    public void testCreateOpSendMsg() {
        RawBatchMessageContainerImpl container = new RawBatchMessageContainerImpl();
        container.createOpSendMsg();
    }