Добавить паттерн Компоновщик в общий список

[Ihor Bielykh]

https://ru.wikipedia.org/wiki/%D0%9A%D0%BE%D0%BC%D0%BF%D0%BE%D0%BD%D0%BE%D0%B2%D1%89%D0%B8%D0%BA_(%D1%88%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD_%D0%BF%D1%80%D0%BE%D0%B5%D0%BA%D1%82%D0%B8%D1%80%D0%BE%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F)

[Alex Lulin]

Добавил.