Understanding Interface Segregation Principle
A client should never be forced to implement an interface that it doesn't use
#solid
Understanding Open-Close Principle
Software entities (classes, modules, functions, etc.) should be open for extension but closed for modification.
Understanding Dependency Inversion Principle
High-level modules should not depend on low-level modules. Both should depend on abstractions. Abstractions should not depend on details. Details should depend on abstractions.
Understanding Liskov Substitution Principle
Objects of a superclass should be replaceable with objects of its subclasses without affecting the correctness of the program.