jboner/akka — comment on commit 57de4c969c59f7b726e08fe260a0596385399cb5
File: akka-testkit/src/main/scala/akka/testkit/TestKitExtension.scala line 20
By rkuhn:

Yes, I was also thinking about this. Extensions will be loaded in the order in which they are given in the configuration (or in program order by calling `registerExtension` manually). There is nothing preventing from calling `registerExtension` themselves, I was contemplating adding `requireExtension(key)`, which would load the extension if not already present. That matches e.g. the LaTeX module system.