ByteConversionSink startChunkedConversion(Sink<List<int>> sink)

Start a chunked conversion using the options given to the ZLibEncoder constructor. While it accepts any Sink taking List<int>'s, the optimal sink to be passed as sink is a ByteConversionSink.

Source 

ByteConversionSink startChunkedConversion(Sink<List<int>> sink) {
  if (sink is! ByteConversionSink) {
    sink = new ByteConversionSink.from(sink);
  }
  return new _ZLibEncoderSink(sink, gzip, level, windowBits, memLevel,
                              strategy, dictionary, raw);
}