public boolean finishAndReleaseAll() {
        return finish(true);
    }
Mark this {@link Channel} as finished and release all pending message in the inbound and outbound buffer.
Any further try to write data to it will fail.

@return bufferReadable returns {@code true} if any of the used buffers has something left to read
plc4j/transports/test/src/main/java/io/netty/channel/embedded/Plc4xEmbeddedChannel.java