code: public ChannelFuture writeOneInbound(Object msg, ChannelPromise promise) {
          if (checkOpen(true)) {
              pipeline().fireChannelRead(msg);
          }
          return checkException(promise);
      }
docs: Writes one message to the inbound of this {@link Channel} and does not flush it. This
  method is conceptually equivalent to {@link #write(Object, ChannelPromise)}.
  
  @see #writeOneOutbound(Object, ChannelPromise)