private ChatWithBot[long] chats;

ChatWithBot createChat(Update u)
{
    const chatId = u.chatId;
    ChatWithBot ret;

    ChatWithBot* found = (chatId in chats);

    if(found is null)
    {
        ret = new ChatWithBot(u);
        chats[chatId] = ret;
    }
    else
    {
        ret = *found;
        import std.stdio; writeln(ret);
        ret.incUpdate(u);
    }

    return ret;
}