*
     * @param url the URL to validate
     * @return true if the URL starts with a supported file protocol, false otherwise
     */
    public boolean isValidFileProtocol(final String url) {
        return stream(fileProtocols).get(stream -> stream.anyMatch(s -> url.startsWith(s)));
    }

    /**
     * Adds a new web protocol to the supported protocols list.

        assertFalse(protocolHelper.isValidFileProtocol("http://example.com"));
        assertFalse(protocolHelper.isValidFileProtocol("https://example.com"));
        assertFalse(protocolHelper.isValidFileProtocol("ftp://example.com"));
        assertFalse(protocolHelper.isValidFileProtocol("ldap://example.com"));
        assertFalse(protocolHelper.isValidFileProtocol("example.com"));