anchor.diff:        _apple = AppleNotification(
             badge: map['apple']['badge'],
             subtitle: map['apple']['subtitle'],
  -          subtitleLocArgs: map['apple']['subtitleLocArgs'] ?? [],
  +          subtitleLocArgs: _toList(map['apple']['subtitleLocArgs']),
             subtitleLocKey: map['apple']['subtitleLocKey'],
             imageUrl: map['apple']['imageUrl'],
             sound: map['apple']['sound'] == null
  
positive.code:   /// This value is a number between 0.0 & 1.0.
    final num volume;
  }
  
negative.code: 
      return RemoteNotification(
        title: map['title'],
        titleLocArgs: _toList(map['titleLocArgs']),
        titleLocKey: map['titleLocKey'],
        body: map['body'],
        bodyLocArgs: _toList(map['bodyLocArgs']),
        bodyLocKey: map['bodyLocKey'],
        android: _android,
        apple: _apple,
  