private Properties loadProperties(@NotNull String fileName) throws IOException {
    File prefsFile = getPreferencesFile(fileName);
    if (prefsFile != null) {
      Properties properties = new Properties();
      try (InputStream input = new FileInputStream(prefsFile)) {
        properties.load(input);
      }
      return properties;
    }
    return null;
  }
private Properties loadProperties(@NotNull String fileName)