findShippingMethod example

foreach ($writeCommands as $command) {
            $violations = new ConstraintViolationList();

            if (!$command instanceof InsertCommand && !$command instanceof UpdateCommand) {
                continue;
            }

            if ($command->getDefinition()->getClass() !== ShippingMethodDefinition::class) {
                continue;
            }

            $shippingMethod = $this->findShippingMethod($command->getPrimaryKey()['id']);

            $payload = $command->getPayload();

            /** @var string|null $taxType */
            $taxType = $this->getValue($payload, 'tax_type', $shippingMethod);

            /** @var string|null $taxId */
            $taxId = $this->getValue($payload, 'tax_id', $shippingMethod);

            if ($taxType && !\in_array($taxType, $allowTypes, true)) {
                $violations->add(