# startChunkedConversion method

ByteConversionSink startChunkedConversion (Sink<String> sink)

Starts a chunked conversion.

The converter works more efficiently if the given `sink` is a StringConversionSink.

## Implementation

    ByteConversionSink startChunkedConversion(Sink<String> sink) {
      StringConversionSink stringSink;
      if (sink is StringConversionSink) {
        stringSink = sink;
      } else {
        stringSink = StringConversionSink.from(sink);
      }
      // TODO(lrn): Use asUtf16Sink when it becomes available. It
      // works just as well, is likely to have less decoding overhead,
      // and make adding U+FFFD easier.
      // At that time, merge this with _Latin1DecoderSink;
      if (_allowInvalid) {
        return _ErrorHandlingAsciiDecoderSink(stringSink.asUtf8Sink(false));
      } else {
        return _SimpleAsciiDecoderSink(stringSink);
      }
    }