oak-blob-*'s use of Guava File.fileTreeTraverser

oak-blob/src/main/java/org/apache/jackrabbit/oak/spi/blob/FileBlobStore.java
246:        FluentIterable<File> iterable = Files.fileTreeTraverser().postOrderTraversal(baseDir);

oak-blob-plugins/src/main/java/org/apache/jackrabbit/oak/plugins/blob/datastore/BlobIdTracker.java
52:import static com.google.common.io.Files.fileTreeTraverser;
469:                fileTreeTraverser().breadthFirstTraversal(rootDir).firstMatch(IN_PROCESS.filter())
474:                fileTreeTraverser().breadthFirstTraversal(rootDir).filter(GENERATION.filter())));

oak-blob-plugins/src/main/java/org/apache/jackrabbit/oak/plugins/blob/datastore/FSBackend.java
140:        return Files.fileTreeTraverser().postOrderTraversal(fsPathDir)
260:        return Files.fileTreeTraverser().postOrderTraversal(fsPathDir)

oak-blob-plugins/src/main/java/org/apache/jackrabbit/oak/plugins/blob/datastore/OakFileDataStore.java
77:        return Files.fileTreeTraverser().postOrderTraversal(new File(path))
241:        return Files.fileTreeTraverser().postOrderTraversal(new File(path))

oak-blob-plugins/src/main/java/org/apache/jackrabbit/oak/plugins/blob/DataStoreCacheUpgradeUtils.java
111:            Files.fileTreeTraverser().postOrderTraversal(path)

oak-blob-plugins/src/main/java/org/apache/jackrabbit/oak/plugins/blob/FileCache.java
304:        Iterator<File> iter = Files.fileTreeTraverser().postOrderTraversal(cacheRoot)

oak-blob-plugins/src/main/java/org/apache/jackrabbit/oak/plugins/blob/UploadStagingCache.java
241:        Iterator<File> iter = Files.fileTreeTraverser().postOrderTraversal(uploadCacheSpace)

oak-blob-plugins/src/test/java/org/apache/jackrabbit/oak/plugins/blob/AbstractBlobTrackerRegistrationTest.java
116:                Files.fileTreeTraverser().postOrderTraversal(blobIdFiles).filter(new Predicate<File>() {