private static final int RETRY_AFTER_SECONDS = 60;

    private static final Set<String> STATIC_EXTENSIONS =
            Arrays.stream(new String[] { ".css", ".js", ".png", ".jpg", ".gif", ".ico", ".svg", ".woff", ".woff2", ".ttf", ".eot" })
                    .collect(Collectors.toSet());

    /**
     * Creates a new instance of LoadControlFilter.
     */
    public LoadControlFilter() {