playframework/Play20 — comment on commit 5188a2434a595fbb18e94c454d6a4c51de9e759a
File: framework/play/src/main/scala/play/api/mvc/Security.scala line 74
By guillaumebort:

Cached can be an Action as well. In fact it makes sense since it can provide its own body parser that will directly returns the cached content if any, without even try to parse the request body.