_:n1fa2e84e12dd42b7923879081263941cxb0
<http://schema.org/sameAs>
<https://www.youtube.com/channel/UCz3cM4qLljXcQ8oWjMPgKZA>
<https://koenig-assets.raywenderlich.com/books/kotlin-apprentice/v2.0/chapters/17-interfaces>