protected static void Init(AbstractWriteTask task, AbstractChannelHandlerContext ctx, object msg, TaskCompletionSource promise)
            {
                task.ctx     = ctx;
                task.msg     = msg;
                task.promise = promise;

                if (EstimateTaskSizeOnSubmit)
                {
                    ChannelOutboundBuffer buffer = ctx.Channel.Unsafe.OutboundBuffer;

                    // Check for null as it may be set to null if the channel is closed already
                    if (buffer != null)
                    {
                        task.size = ctx.pipeline.EstimatorHandle.Size(msg) + WriteTaskOverhead;
                        buffer.IncrementPendingOutboundBytes(task.size);
                    }
                    else
                    {
                        task.size = 0;
                    }
                }
                else
                {
                    task.size = 0;
                }
            }
        Task WriteAsync(object msg, bool flush)
        {
            AbstractChannelHandlerContext next = this.FindContextOutbound();
            object         m            = this.pipeline.Touch(msg, next);
            IEventExecutor nextExecutor = next.Executor;

            if (nextExecutor.InEventLoop)
            {
                return(flush
                    ? next.InvokeWriteAndFlushAsync(m)
                    : next.InvokeWriteAsync(m));
            }
            else
            {
                var promise            = new TaskCompletionSource();
                AbstractWriteTask task = flush
                    ? WriteAndFlushTask.NewInstance(next, m, promise)
                    : (AbstractWriteTask)WriteTask.NewInstance(next, m, promise);
                SafeExecuteOutbound(nextExecutor, task, promise, msg);
                return(promise.Task);
            }
        }