_:nf6b9f74bc02243f8b04620574d1d97f6xb0
<http://schema.org/description>
"Classes are used when you want to create types that contain both state and behavior. \nWhen you need a type that allows primarily the specification of behavior, \nyou&#39;re better off using an interface. See how to create and use interfaces."
<https://koenig-assets.raywenderlich.com/books/kotlin-apprentice/v2.0/chapters/17-interfaces>