OOP again

local function newObject()
    local object = {}
    object.somePublicVar = 100
    local protected = {money = 0}
    function object:setName(name)
        self.name = name
    end
    function object:addMoney(amount)
        protected.money = protected.money + amount
    end
    function object:getMoney()
        return protected.money
    end
    return object, protected
end

local function newChild()
    local object, protected = newObject()
    function object:spendMoney(amount)
        protected.money = protected.money - amount
    end
    local parent_setName = object.setName
    function object:setName(name)
        name = 'Mr. ' .. name
        parent_setName(self, name)
    end
    return object
end

local myChild = newChild()
myChild:setName('Nyashka')
print(myChild.name) -- Mr. Nyashka