# UML

```mermaid
classDiagram
    class Product {
        <<interface>>
        +operation()
    }
    class ConcreteProductA {
        +operation()
    }
    class ConcreteProductB {
        +operation()
    }
    class SimpleFactory {
        +createProduct(string) Product
    }
    Product <|.. ConcreteProductA
    Product <|.. ConcreteProductB
    SimpleFactory ..> Product
    SimpleFactory ..> ConcreteProductA
    SimpleFactory ..> ConcreteProductB
````