public static String getMarketplaceDownloadsUUID() {
    try {
      return DeviceIdManager.getOrGenerateId(new DeviceIdManager.DeviceIdToken() { }, "MarketplaceDownloads");
    }
    catch (DeviceIdManager.InvalidDeviceIdTokenException e) {
      return "";
    }
  }
public static String getMarketplaceDownloadsUUID()