startChunkedConversion method
override
Starts a chunked conversion.
The returned sink serves as input for the long-running conversion. The
given sink
serves as output.
Implementation
ByteConversionSink startChunkedConversion(Sink<String> sink) {
if (sink is StringConversionSink) {
return _Utf8Base64EncoderSink(sink.asUtf8Sink(false), _urlSafe);
}
return _AsciiBase64EncoderSink(sink, _urlSafe);
}