kotlin
good way to inherit class which mandates multiple constructors
https://medium.com/@rygel/stop-repeating-yourself-and-create-custom-views-on-android-with-kotlin-f5b3fc581c0e
https://medium.com/@rygel/stop-repeating-yourself-and-create-custom-views-on-android-with-kotlin-f5b3fc581c0e