write method

Implementation

@override
void write(LogEvent event) {
  if (_closed) return;
  final line = formatter.format(event);
  _tail = _tail.then((_) async {
    try {
      await _ensureOpen();
      _out?.writeln(line);
    } catch (_) {
      // Swallowed per LogSink contract.
    }
  });
}