playframework/Play20 — comment on commit 4239b2a6e9f4abac265ca03dab302273c331cb58
File: framework/play/src/main/scala/play/api/mini/Setup.scala line 11
By guillaumebort:

We need a PartialFunction[String, Action[_]] here (well a Map[String, Action[_]] is also a PartialFunction[String, Action[_]], but it will also allow to declare literal partial function using pattern matching)