public function create() : CurrencyInterface
 {
     $currency = new Currency();
     $currency->setEnabled(true);
     $currency->setCode('');
     return $currency;
 }
 /**
  * {@inheritDoc}
  */
 public function load(ObjectManager $manager)
 {
     if (!$this->isEnabled()) {
         return;
     }
     foreach (self::$samples as $name) {
         $currency = new Currency();
         $currency->setCode($name);
         $currency->setEnabled(true);
         $manager->persist($currency);
         $this->setReference('currency_' . $name, $currency);
     }
     $manager->flush();
     $this->container->get('currency.importer.ecb')->importExchangeRates();
 }