public function getHasOnes()
    {
        $modelNameSpace = $this->relation->getReferencedModel();
        $list = [];
        $relationships = $this->modelManager->getRelations($modelNameSpace);
        foreach ($relationships as $relation) {
            $refType = $relation->getType();
            if ($refType == 1) {
                $list[] = $relation->getReferencedModel();
            }
        }

        return $list;
    }