docs: public StreamListing listStreams(boolean live, String prefix, String marker) throws QiniuException {
          StringMap map = new StringMap();
  
          map.putWhen("liveonly", live, live);
          map.putNotEmpty("prefix", prefix);
          map.putNotEmpty("marker", marker);
  
          String path = "";
  
          if (map.size() != 0) {
              path += "?" + map.formString();
          }
          return get(path, StreamListing.class);
      }