@Override
        public Optional<ResourcePoolEntry> findEntry(String path) {
            if (!path.startsWith("/")) {
                path = "/" + path;
            }
            if (!path.startsWith("/" + name)) {
                path = "/" + name + path;
            }
            return Optional.ofNullable(moduleContent.get(path));
        }

For findEntry("module-info.class") and module name "m" it will first change path to "/module-info.class" and then see that path.startsWith("/m") is true and not append "/m".

            if (!path.startsWith("/" + name + "/")) {
                path = "/" + name + path; // path must start with "/" already
            }