addQuickComment method Null safety
Add a quick comment.
Implementation
Future<NIMResult<int>> addQuickComment(
    NIMMessage msg,
    int replyType,
    String ext,
    bool needPush,
    bool needBadge,
    String pushTitle,
    String pushContent,
    Map<String, Object> pushPayload) {
  return _platform.addQuickComment(msg, replyType, ext, needPush, needBadge,
      pushTitle, pushContent, pushPayload);
}