code: public static Bundle getAppLinkExtras(Intent intent) {
      Bundle appLinkData = getAppLinkData(intent);
      if (appLinkData == null) {
        return null;
      }
      return appLinkData.getBundle(KEY_NAME_EXTRAS);
    }
docs: Gets the App Link extras for an intent, if there is any.
  
  @param intent the incoming intent.
  @return a bundle containing the App Link extras for the intent, or {@code null} if none is
  specified.