@Override
  protected ContentWriter getWriterInternal(
      ContentReader existingContentReader, String newContentUrl) {
    if (newContentUrl == null) newContentUrl = FileContentStore.createNewFileStoreUrl() + ".slow";

    return new SlowWriter(newContentUrl, existingContentReader);
  }
 @Override
 public void getUrls(Date createdAfter, Date createdBefore, ContentUrlHandler handler)
     throws ContentIOException {
   // Make up it up
   for (int i = 0; i < count; i++) {
     String contentUrl = FileContentStore.createNewFileStoreUrl() + "-imaginary";
     handler.handle(contentUrl);
   }
 }