/**
  * Converts the custom Entity returned by the API into a plain
  * associative array suitable for use with the custom Products post
  * type. This completely hides the details of the API results from
  * the WP plugin.
  *
  * @param \Swader\Diffbot\Entity\Product $product The returned Product entity from which to extract values.
  * @return object
  */
 protected function map_product_fields_oldlib(\Swader\Diffbot\Entity\Product $product)
 {
     return ['title' => $product->getTitle(), 'text' => $product->getText(), 'offer_price' => $product->getOfferPrice(), 'regular_price' => $product->getRegularPrice(), 'source_url' => $product->getPageUrl()];
 }