position property Null safety
Implementation
int get position => _position;Implementation
set position(int p) {
  if (_file == null || p == _position) {
    return;
  }
  _position = p;
  _file!.setPositionSync(p);
}int get position => _position;set position(int p) {
  if (_file == null || p == _position) {
    return;
  }
  _position = p;
  _file!.setPositionSync(p);
}