protected function getDeliveryExecutionService()
    {
        if (!$this->deliveryExecutionService) {
            $this->deliveryExecutionService = $this->getServiceLocator()->get(ServiceProxy::SERVICE_ID);
        }
        return $this->deliveryExecutionService;
    }
protected function getDeliveryExecutionService()
    {
        if (!$this->deliveryExecutionService) {
            $this->deliveryExecutionService = $this->getServiceLocator()->get(ServiceProxy::SERVICE_ID);
        }
        return $this->deliveryExecutionService;
    }
protected function getDeliveryExecutionService ( ) { if ( ! $ this -> deliveryExecutionService ) { $ this -> deliveryExecutionService = $ this -> getServiceLocator ( ) -> get ( ServiceProxy :: SERVICE_ID ) ; } return $ this -> deliveryExecutionService ; }
Get the implementation of delivery execution service

@return ServiceProxy
@throws \Zend\ServiceManager\Exception\ServiceNotFoundException
Get the implementation of delivery execution service