fetchUnreadMentiondMessage method

Implementation

void fetchUnreadMentiondMessage() {
  _unreadMentionedMessages = [];
  for (var i = 0; i < _messages.length; i++) {
    if (_messages[i].mentionedInfo != null &&
        _messages[i].receivedStatus == RCIMIWReceivedStatus.unread) {
      _unreadMentionedMessages?.add(_messages[i]);
    }
  }
  notifyListeners();
}