GraphAware\Neo4j\OGM\Metadata\RelationshipMetadata::isRelationshipEntity PHP Method

    public function isRelationshipEntity()
    {
        return null !== $this->relationshipAnnotation->relationshipEntity;
    }

 public function __construct(EntityManager $em, $baseEntity, $targetEntityClass, RelationshipMetadata $relationshipMetadata, $initialEntity = null)
 {
     $this->finder = $relationshipMetadata->isRelationshipEntity() ? new RelationshipEntityFinder($em, $targetEntityClass, $relationshipMetadata, $baseEntity) : new RelationshipsFinder($em, $targetEntityClass, $relationshipMetadata);
     $this->em = $em;
     $this->collection = new Collection();
     $this->baseId = $this->em->getClassMetadataFor(get_class($baseEntity))->getIdValue($baseEntity);
     $this->initialEntity = $initialEntity;
     $this->baseEntityClass = get_class($baseEntity);
     $this->relationshipMetadata = $relationshipMetadata;
     $this->baseInstance = $baseEntity;
 }