private static @Nullable PropertiesFile findPropertiesFile(@NotNull PsiFile file) {
    final PropertiesFile propertiesFile = PropertiesImplUtil.getPropertiesFile(file);
    if (!(propertiesFile instanceof PropertiesFileImpl)) {
      return null;
    }
    for (AlphaUnsortedPropertiesFileInspectionSuppressor filter : AlphaUnsortedPropertiesFileInspectionSuppressor.EP_NAME.getExtensions()) {
      if (filter.suppressInspectionFor(propertiesFile)) {
        return null;
      }
    }
    return propertiesFile;
  }
private static @Nullable PropertiesFile findPropertiesFile(@NotNull PsiFile file)