code: protected Iterator<String> getSpaceContents(String spaceId) {
          for (int i = 0; i < maxRetries; i++) {
              try {
                  return s3Provider.getSpaceContents(spaceId, null);
              } catch (Exception e) {
                  log.warn("Exception encountered attempting to get contents " +
                           "for streaming space: " + spaceId +
                           ", error message: " + e.getMessage());
                  wait(i);
              }
          }
          throw new DuraCloudRuntimeException("Exceeded retries attempting to " +
                                              "get space contents for " + spaceId);
      }
docs: /*
  Get a listing of items in a space