void IDataCallback.OnDataAvailable(IDataEmitter emitter, ByteBufferList bb)
            {
                var handler = onDataAvailable;

                if (handler != null)
                {
                    handler(emitter, bb);
                }
            }
            public override void OnCompleted(Java.Lang.Exception exception, IAsyncHttpResponse s, ByteBufferList t)
            {
                var handler = onCompleted;

                if (handler != null)
                {
                    handler(exception, s, t);
                }
            }