private static @Nullable PropertiesFile findPropertiesFile(Project project, String propertiesFilePath) {
    VirtualFile propertiesVFile = LocalFileSystem.getInstance().findFileByPath(FileUtil.toSystemIndependentName(propertiesFilePath));
    if (propertiesVFile != null) {
      return PropertiesImplUtil.getPropertiesFile(PsiManager.getInstance(project).findFile(propertiesVFile));
    }
    return null;
  }
private static @Nullable PropertiesFile findPropertiesFile(Project project, String propertiesFilePath)