public function setUp()
 {
     $this->persistEvent = $this->prophesize(PersistEvent::class);
     $this->notImplementing = new \stdClass();
     $this->document = $this->prophesize(StructureTypeFilingBehavior::class);
     $this->document->willImplement(StructureBehavior::class);
     $this->parentDocument = new \stdClass();
     $this->nodeManager = $this->prophesize(NodeManager::class);
     $this->documentManager = $this->prophesize(DocumentManager::class);
     $this->metadataFactory = $this->prophesize(MetadataFactoryInterface::class);
     $this->metadata = $this->prophesize(Metadata::class);
     $this->parentNode = $this->prophesize(NodeInterface::class);
     $this->subscriber = new StructureTypeFilingSubscriber($this->nodeManager->reveal());
 }