Creates a new instance combining a StringSink sink
and a callback onClose
which is invoked when the returned instance is closed.
factory ClosableStringSink.fromStringSink(StringSink sink, void onClose()) = _ClosableStringSink;
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-convert/ClosableStringSink/ClosableStringSink.fromStringSink.html