DesignPatterns

- Decorator is a structural design pattern that lets you attach new behaviors to objects by placing these objects inside special wrapper objects that contain the behaviors. https://refactoring.guru/design-patterns/decorator

- Chain of Responsibility is a behavioral design pattern that lets you pass requests along a chain of handlers. Upon receiving a request, each handler decides either to process the request or to pass it to the next handler in the chain. https://refactoring.guru/design-patterns/chain-of-responsibility

- Observer is a behavioral design pattern that lets you define a subscription mechanism to notify multiple objects about any events that happen to the object they’re observing. https://refactoring.guru/design-patterns/observer

- Factory Method is a creational design pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created. https://refactoring.guru/design-patterns/factory-method

- Abstract Factory is a creational design pattern that lets you produce families of related objects without specifying their concrete classes. https://refactoring.guru/design-patterns/abstract-factory