Actually load the metadata from the underlying metadata
ClassMetadata $class:
ClassMetadata|null $parent:
bool $rootEntityFound:
array $nonSuperclassParents classnames all parent classes that are not marked as mapped superclasses:
void
Overrides AbstractClassMetadataFactory::doLoadMetadata
protected function doLoadMetadata($class, $parent, $rootEntityFound, array $nonSuperclassParents) {
}