description

# ClosableStringSink.fromStringSink constructor

ClosableStringSink.fromStringSink(

1. StringSink sink,
2. void onClose()

)

Creates a new instance combining a StringSink `sink` and a callback `onClose` which is invoked when the returned instance is closed.

## Implementation

    factory ClosableStringSink.fromStringSink(
      StringSink sink,
      void Function() onClose,
    ) = _ClosableStringSink;