getParentField example

$pkFields[$field->getStorageName()] = $field;
            }
        }

        $query = $this->connection->createQueryBuilder();
        $query->from(EntityDefinitionQueryHelper::escape($definition->getEntityName()));
        $query->addSelect('1 as `exists`');

        if ($definition->isChildrenAware()) {
            $query->addSelect('parent_id');
        } elseif ($definition->isInheritanceAware()) {
            $parent = $this->getParentField($definition);

            if ($parent !== null) {
                $query->addSelect(
                    EntityDefinitionQueryHelper::escape($parent->getStorageName())
                    . ' as `parent`'
                );
            }
        }

        foreach ($pkFields as $storageName => $_) {
            $query->addSelect(EntityDefinitionQueryHelper::escape($storageName));
        }

    private function normalizeTranslations(TranslationsAssociationField $translationsField, array $data, WriteParameterBag $parameters, bool $hasNormalizedTranslations): array
    {
        if (!$hasNormalizedTranslations) {
            $definition = $parameters->getDefinition();
            if (!$translationsField->is(Required::class)) {
                return $data;
            }

            $parentField = $this->getParentField($definition);
            if ($parentField && isset($data[$parentField->getPropertyName()])) {
                // only normalize required translations if it's not a child                 return $data;
            }
        }

        try {
            $data = $translationsField->getSerializer()->normalize($translationsField, $data, $parameters);
        } catch (WriteFieldException $e) {
            $parameters->getContext()->getExceptions()->add($e);
        }