Sonata\Component\Currency\CurrencyDetectorInterface::getCurrency PHP Method

    public function getCurrency();

 /**
  * Add the meta information.
  *
  * @param SeoPageInterface $seoPage
  * @param ProductInterface $product
  */
 public function alterPage(SeoPageInterface $seoPage, ProductInterface $product)
 {
     $seoPage->addMeta('name', 'twitter:card', 'product')->addMeta('name', 'twitter:title', $product->getName())->addMeta('name', 'twitter:description', substr($product->getDescription(), 0, 200))->addMeta('name', 'twitter:label1', 'Price')->addMeta('name', 'twitter:data1', $this->numberHelper->formatCurrency($product->getPrice(), $this->currencyDetector->getCurrency()))->addMeta('name', 'twitter:label2', 'SKU')->addMeta('name', 'twitter:data2', $product->getSku())->addMeta('name', 'twitter:site', $this->site)->addMeta('name', 'twitter:creator', $this->creator)->addMeta('name', 'twitter:domain', $this->domain);
     if ($image = $product->getImage()) {
         $provider = $this->mediaPool->getProvider($image->getProviderName());
         $seoPage->addMeta('property', 'twitter:image:src', $provider->generatePublicUrl($image, $this->mediaFormat));
     }
 }