in src/main/java/org/apache/sling/feature/extension/unpack/Unpack.java [227:236]
private List<String> parseRoots(String index) {
List<String> roots = new ArrayList<>();
if (index != null) {
roots.addAll(Stream.of(Parser.parseDelimitedString(index, ",")).map(root -> root.endsWith("/") ? root : root + "/").map(root -> root.startsWith("/") ? root : "/" + root).collect(Collectors.toList()));
} else {
roots.add("/");
}
return roots;
}