static FSubobjectEditorTreeNodePtrType FindOrCreateSlateNodeForHandle ( const [FSubobjectDataHandle](API\Editor\SubobjectDataInterface\FSubobjectDataHandle) & Handle, [TMap](API\Runtime\Core\Containers\TMap)< [FSubobjectDataHandle](API\Editor\SubobjectDataInterface\FSubobjectDataHandle), FSubobjectEditorTreeNodePtrType > & ExistingNodes )