if (!isset($this->derivatives)) {
// Add in the default plugin configuration and the resource type.
foreach ($this->entityManager->getDefinitions() as $entity_type_id => $entity_type) {
+ if ($entity_type->isInternal()) {
+ continue;
+ }
+
$this->derivatives[$entity_type_id] = [
'id' => 'entity:' . $entity_type_id,
'entity_type' => $entity_type_id,