code: public function transform($price)
      {
          $this->loadPriceMap();
  
          if (!$price) {
              return 0;
          }
  
          $price = intval($price * 100);
  
          if (!isset($this->pricesMap[$price])) {
              throw new \InvalidArgumentException(sprintf(
                  'Can\'t transform price "%s". Not found price in prices map.',
                  $price / 100
              ));
          }
  
          return $this->pricesMap[$price] / 100;
      }
docs: {@inheritDoc}