code: protected String format(ChannelHandlerContext ctx, String eventName, Object firstArg, Object secondArg) {
          if (secondArg == null) {
              return formatSimple(ctx, eventName, firstArg);
          }
  
          String chStr = ctx.channel().toString();
          String arg1Str = String.valueOf(firstArg);
          String arg2Str = secondArg.toString();
          StringBuilder buf = new StringBuilder(
                  chStr.length() + 1 + eventName.length() + 2 + arg1Str.length() + 2 + arg2Str.length());
          buf.append(chStr).append(' ').append(eventName).append(": ").append(arg1Str).append(", ").append(arg2Str);
          return buf.toString();
      }
docs: Formats an event and returns the formatted message.  This method is currently only used for formatting
  {@link ChannelOutboundHandler#connect(ChannelHandlerContext, SocketAddress, SocketAddress, ChannelPromise)}.
  
  @param eventName the name of the event
  @param firstArg  the first argument of the event
  @param secondArg the second argument of the event