private @NotNull Collection<PropertiesFile> getFilesToSort(@NotNull PsiFile file) {
      PropertiesFile propertiesFile = findPropertiesFile(file);
      if (propertiesFile == null) return Collections.emptyList();
      if (myOnlyCurrentFile) {
        return Collections.singleton(propertiesFile);
      }
      return propertiesFile.getResourceBundle().getPropertiesFiles();
    }
private @NotNull Collection<PropertiesFile> getFilesToSort(@NotNull PsiFile file)