static int RemoveObserver(IntPtr L)
    {
        try
        {
            ToLua.CheckArgsCount(L, 3);
            Observers.Facade obj  = (Observers.Facade)ToLua.CheckObject(L, 1, typeof(Observers.Facade));
            string           arg0 = ToLua.CheckString(L, 2);
            System.Func <Observers.Interfaces.INotification, bool> arg1 = null;
            LuaTypes funcType3 = LuaDLL.lua_type(L, 3);

            if (funcType3 != LuaTypes.LUA_TFUNCTION)
            {
                arg1 = (System.Func <Observers.Interfaces.INotification, bool>)ToLua.CheckObject(L, 3, typeof(System.Func <Observers.Interfaces.INotification, bool>));
            }
            else
            {
                LuaFunction func = ToLua.ToLuaFunction(L, 3);
                arg1 = DelegateFactory.CreateDelegate(typeof(System.Func <Observers.Interfaces.INotification, bool>), func) as System.Func <Observers.Interfaces.INotification, bool>;
            }

            obj.RemoveObserver(arg0, arg1);
            return(0);
        }
        catch (Exception e)
        {
            return(LuaDLL.toluaL_exception(L, e));
        }
    }