code: public function getClassProperties()
      {
          return [
              'price' => $this->getPrice(),
              'pseudoPrice' => $this->getPseudoPrice(),
              'customerGroupIdentifier' => $this->getCustomerGroupIdentifier(),
              'fromAmount' => $this->getFromAmount(),
              'toAmount' => $this->getToAmount(),
          ];
      }
docs: {@inheritdoc}