@SuppressWarnings("unchecked")
    public <T> T readOutbound() {
        T message =  (T) poll(outboundMessages);
        if (message != null) {
            ReferenceCountUtil.touch(message, "Caller of readOutbound() will handle the message from this point.");
        }
        return message;
    }
Read data from the outbound. This may return {@code null} if nothing is readable.
plc4j/transports/test/src/main/java/io/netty/channel/embedded/Plc4xEmbeddedChannel.java