@Override
 protected void addTenObjectsUnderRoot(String containerName) throws InterruptedException {
   BlobMap blobMap = createMap(context, containerName, ListContainerOptions.NONE);
   for (int i = 0; i < 10; i++) {
     blobMap.put(i + "", blobMap.blobBuilder().payload(i + "content").build());
   }
 }
 @Override
 protected void addTenObjectsUnderPrefix(String containerName, String prefix)
     throws InterruptedException {
   BlobMap blobMap = createMap(context, containerName, inDirectory(prefix));
   for (int i = 0; i < 10; i++) {
     blobMap.put(i + "", blobMap.blobBuilder().payload(i + "content").build());
   }
 }