private void flushOutbound0() {
        // We need to call runPendingTasks first as a ChannelOutboundHandler may used eventloop.execute(...) to
        // delay the write on the next eventloop run.
        runPendingTasks();

        flush();
    }
Flushes the outbound of this {@link Channel}. This method is conceptually equivalent to {@link #flush()}.

@see #flushInbound()
plc4j/transports/test/src/main/java/io/netty/channel/embedded/Plc4xEmbeddedChannel.java