Repository repository = new VFSRepository(producer.getIoService());
((VFSRepository)repository).setDescriptor(descriptor);
boolean rootFolderExists = repository.directoryExists("/processes/nested");
assertTrue(rootFolderExists);
Collection<Asset> assets = repository.listAssets("/processes/nested");
assertNotNull(assets);
assertEquals(1, assets.size());
Asset<String> asset = assets.iterator().next();
assertEquals("bpmn2", asset.getAssetType());