getAfter example

    private function hydrateRuleIds(array $fields, EntityWrittenEvent $nestedEvent, array $ruleIds): array
    {
        foreach ($nestedEvent->getWriteResults() as $result) {
            $changeSet = $result->getChangeSet();
            $payload = $result->getPayload();

            foreach ($fields as $field) {
                if ($changeSet && $changeSet->hasChanged($field->getStorageName())) {
                    $ruleIds[] = $changeSet->getBefore($field->getStorageName());
                    $ruleIds[] = $changeSet->getAfter($field->getStorageName());
                }

                if ($changeSet) {
                    continue;
                }

                if (!empty($payload[$field->getPropertyName()])) {
                    $ruleIds[] = Uuid::fromHexToBytes($payload[$field->getPropertyName()]);
                }
            }
        }

        

                    $command->requestChangeSet();
                }
            });

        $result = $this->productRepository->update([$update], Context::createDefaultContext());

        $changeSet = $this->getChangeSet(ProductDefinition::ENTITY_NAME, $result);

        static::assertTrue($changeSet->hasChanged('stock'));
        static::assertEquals(1, $changeSet->getBefore('stock'));
        static::assertEquals(100, $changeSet->getAfter('stock'));
    }

    public function testUpdateWithSameValue(): void
    {
        $id = $this->ids->get('product');

        $update = ['id' => $id, 'stock' => 1];

        $this->getContainer()->get('event_dispatcher')
            ->addListener(PreWriteValidationEvent::class, function DPreWriteValidationEvent $event): void {
                foreach ($event->getCommands() as $command) {
                    

$type = $changeSet->getBefore('type');

            if ($type !== LineItem::PRODUCT_LINE_ITEM_TYPE) {
                continue;
            }

            if (!$changeSet->hasChanged('referenced_id') && !$changeSet->hasChanged('quantity')) {
                continue;
            }

            $ids[] = $changeSet->getBefore('referenced_id');
            $ids[] = $changeSet->getAfter('referenced_id');
        }

        /** @var list<string> $ids */
        $ids = array_filter(array_unique($ids));

        if (empty($ids)) {
            return;
        }

        $this->update($ids, $event->getContext());
    }