@Contract(value = "_ -> new", pure = true)
  static @NotNull ColoredText singleFragment(@Nls @NotNull String fragmentText) {
    return singleFragment(fragmentText, SimpleTextAttributes.REGULAR_ATTRIBUTES);
  }
@Contract(value = "_ -> new", pure = true)
  static @NotNull ColoredText singleFragment(@Nls @NotNull String fragmentText)