IOSink(StreamConsumer<List<int>> target, {Encoding encoding: UTF8})

Create an IOSink that outputs to a [target] [StreamConsumer] of bytes.

Text written to StreamSink methods is encoded to bytes using encoding before being output on target.

Source 

factory IOSink(StreamConsumer<List<int>> target,
               {Encoding encoding: UTF8})
    => new _IOSinkImpl(target, encoding);