return new ArrayList<FileCollection>((Set) collection.getFrom());
}
if (expected instanceof CompositeFileCollection) {
CompositeFileCollection collection = (CompositeFileCollection) expected;
DefaultFileCollectionResolveContext context = new DefaultFileCollectionResolveContext();
collection.resolve(context);
return context.resolveAsFileCollections();
}
throw new RuntimeException("Cannot get children of " + expected);
}