https://medium.com/@cogitator/a-kotlin-android-library-for-developers-to-give-folding-animations-to-the-recyclerview-items-and-56ef6d10bad8

Every android developers want to code in Kotlin since Google has declared Kotlin as official language for development of Android applications.

Google has announced Kotlin as official language and they started supporting Kotlin. But many libraries and SDKs still to go to far to provide support in Kotlin.