code: public BoxFileUploadSessionPartList listParts(int offset, int limit) {
          URL listPartsURL = this.sessionInfo.getSessionEndpoints().getListPartsEndpoint();
          URLTemplate template = new URLTemplate(listPartsURL.toString());
  
          QueryStringBuilder builder = new QueryStringBuilder();
          builder.appendParam(OFFSET_QUERY_STRING, offset);
          String queryString = builder.appendParam(LIMIT_QUERY_STRING, limit).toString();
  
          //Template is initalized with the full URL. So empty string for the path.
          URL url = template.buildWithQuery("", queryString);
  
          BoxJSONRequest request = new BoxJSONRequest(this.getAPI(), url, HttpMethod.GET);
          BoxJSONResponse response = (BoxJSONResponse) request.send();
          JsonObject jsonObject = JsonObject.readFrom(response.getJSON());
  
          return new BoxFileUploadSessionPartList(jsonObject);
      }
docs: Returns a list of all parts that have been uploaded to an upload session.
  @param offset paging marker for the list of parts.
  @param limit maximum number of parts to return.
  @return the list of parts.