private function importContentType(
        $contentTypeName,
        Bag $importData,
        MutableBag $relationQueue,
        MutableBag $responseBag,
        $overwrite
    ) {
        $count = 0;
        /** @var Repository $repo */
        $repo = $this->em->getRepository($contentTypeName);

        // Build a list of the relationship field names for this ContentType
        $relationFields = MutableBag::from([]);
        $taxonomyFields = MutableBag::from([]);
        foreach ($repo->getClassMetadata()->getFieldMappings() as $field) {
            if (is_a($field['fieldtype'], RelationType::class, true)) {
                $relationFields->add($field['fieldname']);
            }
            if (is_a($field['fieldtype'], TaxonomyType::class, true)) {
                $taxonomyFields->add($field['fieldname']);
            }
        }

        /** @var MutableBag $importDatum */
        foreach ($importData as $importDatum) {
            /** @var Content $entity */
            $entity = $repo->create(['contenttype' => $contentTypeName]);
            $values = $importDatum->toArrayRecursive();
            $entity->setValues($values);
            // Add relations now so they can still be applied if required on re-runs
            $this->addRelations($repo, $relationQueue, $importDatum, $relationFields);
            // Add taxonomy fields
            $this->addTaxonomy($entity, $taxonomyFields, $importDatum);

            $existing = $this->query->getContent($entity->getContenttype() . '/' . $entity->getSlug());
            if ($existing instanceof Content) {
                $entity->setId($existing->getId());
            }
            // If the entity already exists and we're not doing overwrite, exit early
            if ($entity->getId() !== null && $overwrite === false) {
                $responseBag->get('warning')->add(sprintf('ContentType "%s" with slug "%s" exists already! Skipping record.', $contentTypeName, $entity->getSlug()));
                continue;
            }

            $repo->save($entity);
            ++$count;
        }

        $responseBag->get('success')->add("- $count records for '$contentTypeName'");
    }