@Override
    public boolean preTransfer(StateMachine sm, LexicalElement input) {

        MQOBackImage backimage = null;
        boolean ret = true;

        switch (input) {
        case CHUNK_BACKIMAGE:
            backimage = new MQOBackImage();
            sm.push(backimage);
            break;
        case PAREN_CHUNK_BEGIN:
            break;
        case BYTE_ARRAY:
            break;
        case FLOAT:
            break;
        case INT:
            break;
        case PAREN_CHUNK_END:
            break;
        default:
            break;
        }

        return ret;
    }