public Queue<Object> inboundMessages() {
        if (inboundMessages == null) {
            inboundMessages = new ArrayDeque<>();
        }
        return inboundMessages;
    }
Returns the {@link Queue} which holds all the {@link Object}s that were received by this {@link Channel}.
plc4j/transports/test/src/main/java/io/netty/channel/embedded/Plc4xEmbeddedChannel.java