
https://confadmin.trifork.com/dl/2018/GOTO_Berlin/Migrating_to_Scala_2.13.pdf

https://github.com/guardian/maintaining-scala-projects/issues/2

https://docs.scala-lang.org/overviews/core/collections-migration-213.html


https://www.playframework.com/documentation/3.0.x/Migration29


