@Override
  public PsiFile @Nullable [] getFiles() {
    ResourceBundle rb = getValue();
    if (rb == null) return null;
    final List<PropertiesFile> files = rb.getPropertiesFiles();
    return ContainerUtil.map2Array(files, new PsiFile[files.size()], propertiesFile -> propertiesFile.getContainingFile());
  }
@Override
  public PsiFile @Nullable [] getFiles()