code: public final TcpClient doOnConnected(Consumer<? super Connection> doOnConnected) {
  		Objects.requireNonNull(doOnConnected, "doOnConnected");
  		return new TcpClientDoOn(this, null, doOnConnected, null);
  	}
docs: Setup a callback called after {@link Channel} has been connected.
  
  @param doOnConnected a consumer observing connected events
  
  @return a new {@link TcpClient}