* relies on paths to uniquely identify resources and not path+query components.
     */
    private boolean isCacheableResource(URI source) {
        return source.getRawQuery() == null;
    }

            return URI.create(parent.getPath()).getPath();
        }
        return parent.getPath();
    }

    private static String extractQuery(URI uri) {
        String rawQuery = uri.getRawQuery();
        if (rawQuery == null) {
            return "";
        }
        return "?" + rawQuery;
    }

    private static String encodeRoot(URI uri) {