Видео с ютуба How To Use Extention To Adopt A Protocol In Swift

Chapter 8. Protocols and Extensions: A Swift Lesson in Protocol - Part 4

Chapter 8. Protocols and Extensions: A Swift Lesson in Protocol - Part 3

Chapter 8. Protocols and Extensions: A Swift Lesson in Protocol - Part 1

Chapter 8. Protocols and Extensions: A Swift Lesson in Protocol - Part 2

Swift Tutorials - Part 32, Protocols through Extension