duration property

Implementation

Duration get duration {
  var items = _generateAbsoluteItems().map((item) => item.end);

  int itemsDuration = items.sorted((a, b) => a.compareTo(b)).lastOrNull ?? 0;
  int scenesDuration =
      _scenes
          .map(
            (scene) =>
                scene.begin.inMicroseconds + scene.duration.inMicroseconds,
          )
          .sorted((a, b) => a.compareTo(b))
          .lastOrNull ??
      0;

  return Duration(microseconds: max(itemsDuration, scenesDuration));
}