$def<R> method

@mustCallSuper R $def<R>(R callback())

Implementation

@mustCallSuper
R $def<R>(R Function() callback) {
  _batchLock++;
  final result = callback();
  _batchLock--;
  {
    _prefixes.update(
      iD,
      (v) => v..remove(_batchLock),
      ifAbsent: () => {},
    );
  }
  return result;
}