void unregisterAdditionalIndentOptions(@NotNull FileType fileType) {
    FileType registered = findRegisteredFileType(fileType);
    if (registered != null && !(registered instanceof TempFileType)) {
      FileType tempFileType = new TempFileType(fileType.getDefaultExtension());
      IndentOptions indentOptions = myAdditionalIndentOptions.get(fileType);
      myAdditionalIndentOptions.remove(fileType);
      myAdditionalIndentOptions.put(tempFileType, indentOptions);
    }
  }
void unregisterAdditionalIndentOptions(@NotNull FileType fileType)