Should be able to get a added Archive as a type

It should be possible to "get" a nested Archive out of the parent Archive without having to cast/rely on impl details:

Archive<?> applicationArchive = ((ArchiveAsset)archive.get(ArchivePaths.create("test.war")).getAsset()).getArchive();

A simple design could be:

WebArchive applicationArchive = archive.get(WebArchive.class, ArchivePaths.create("test.war"));