private static @NotNull String suggestBlockName(Iterable<String> classNames) {
    String result = ContainerUtil.find(classNames, className -> BLOCK_NAME_PATTERN.matcher(className).matches());
    if (result == null) {
      result = ContainerUtil.find(classNames, s -> s != null && !s.isEmpty() && Character.isLetter(s.charAt(0)));
    }
    return StringUtil.notNullize(result);
  }
private static @NotNull String suggestBlockName(Iterable<String> classNames)