code: private boolean volumesCreated() {
  		for( Map.Entry<String,String> entry : this.storageIdToVolumeId.entrySet()) {
  			String volumeId = entry.getValue();
  			if(! volumeCreated(volumeId)) return false;
  		}
  		return true;
  	}
docs: Checks whether all specified volumes are created.
  @return true if all volumes created, false otherwise