insert method

Playlist insert(int index, Audio audio)

Implementation

Playlist insert(int index, Audio audio) {
  if (index >= 0) {
    if (index < audios.length) {
      audios.insert(index, audio);
      super.currentlyOpenedIn.forEach((playerEditor) {
        playerEditor.onAudioAddedAt(index);
      });
    } else {
      return add(audio);
    }
  }
  return this;
}