code: def annotation_dir(self):
      return ""
  
file_path: dgl/examples/mxnet/scenegraph/data/object.py
imports: from __future__ import absolute_import, division
  import json
  import logging
  import os
  import pickle
  import warnings
  from collections import Counter
  import mxnet
  import numpy
  from gluoncv.data import COCODetection
label_desc: Use image node_id 2 for calling the VGObject obj's underlying member method code with example usage: obj.annotation_dir() and returns: str