public function collectRates(RateRequest $request)
  {

    // Check if postcode is allowed
    if (!$this->isActive() || !$this->postcodeValidate($request->getDestPostcode()))
    {
        return false;
    }

    $result = $this->_rateResultFactory->create();
    $shippingPrice = $this->getConfigData('price');

    $method = $this->_rateMethodFactory->create();

    $method->setCarrier($this->getCarrierCode());
    $method->setCarrierTitle($this->getConfigData('title'));

    $method->setMethod($this->getCarrierCode());
    $method->setMethodTitle($this->getConfigData('name'));

    $method->setPrice($shippingPrice);
    $method->setCost($shippingPrice);

    $result->append($method);
    return $result;
  }