public static @NotNull Couple<String> splitScheme(@NotNull String url) {
    int index = url.indexOf(URLUtil.SCHEME_SEPARATOR);
    if (index == -1) {
      return Couple.of("", url);
    }
    return Couple.of(url.substring(0, index), url.substring(index+URLUtil.SCHEME_SEPARATOR.length()));
  }
public static @NotNull Couple<String> splitScheme(@NotNull String url)