public long addDatastream(String pid, InputStream content, Map<String, String> hints)
     throws LowlevelStorageException {
   return datastreamStore.add(pid, content, hints);
 }
 public void addObject(String pid, InputStream content, Map<String, String> hints)
     throws LowlevelStorageException {
   objectStore.add(pid, content, hints);
 }