/**
  * @param Google_Service_ShoppingContent_Product $product
  * @param null|int                               $storeId
  *
  * @return Google_Service_ShoppingContent_Product
  */
 public function insertProduct(Google_Service_ShoppingContent_Product $product, $storeId = null)
 {
     $merchantId = $this->getConfig()->getConfigData('account_id', $storeId);
     $product->setChannel("online");
     $expDate = date("Y-m-d", time() + 30 * 24 * 60 * 60);
     //product expires in 30 days
     $product->setExpirationDate($expDate);
     $result = $this->getShoppingService($storeId)->products->insert($merchantId, $product);
     return $result;
 }