copyWith method
Implementation
@override
UpdateMessageMentionRead copyWith({
  int? chatId,
  int? messageId,
  int? unreadMentionCount,
  dynamic extra,
  int? clientId,
}) =>
    UpdateMessageMentionRead(
      chatId: chatId ?? this.chatId,
      messageId: messageId ?? this.messageId,
      unreadMentionCount: unreadMentionCount ?? this.unreadMentionCount,
      extra: extra ?? this.extra,
      clientId: clientId ?? this.clientId,
    );