convertUnitStruct example

        $data['minpurchase'] = null;
        $data['maxpurchase'] = $this->config->get('maxPurchase');
        $data['purchasesteps'] = 1;
        $data['purchaseunit'] = null;
        $data['referenceunit'] = null;
        $data['packunit'] = null;
        $data['unitID'] = null;
        $data['sUnit'] = ['unit' => '', 'description' => ''];
        $data['unit_attributes'] = [];

        if ($price->getUnit() instanceof Unit) {
            $data = array_merge($data, $this->convertUnitStruct($price->getUnit()));
        }

        return $this->eventManager->filter('Legacy_Struct_Converter_Convert_Product_Price', $data, [
            'price' => $price,
        ]);
    }

    /** * Converts the passed ProductStream struct to an array structure. * * @return array */