code: public ListObjectsResponse listObjects(String bucketName, String prefix) {
          return this.listObjects(new ListObjectsRequest(bucketName, prefix));
      }
docs: Returns ListObjectsResponse containing a list of summary information about the objects in the specified buckets.
  List results are <i>always</i> returned in lexicographic (alphabetical) order.
  
  @param bucketName The name of the Bos bucket to list.
  @param prefix An optional parameter restricting the response to keys beginning with the specified prefix.
  Use prefixes to separate a bucket into different sets of keys, similar to how a file system
  organizes files into directories.
  @return ListObjectsResponse containing a listing of the objects in the specified bucket, along with any
  other associated information, such as common prefixes (if a delimiter was specified), the original
  request parameters, etc.