code: def _get_image(self, i):
      img_path = os.path.join(
          self.img_root, self.id_to_prop[self.ids[i]]["file_name"]
      )
      img = utils.read_image(img_path, dtype=np.float32, color=True)
      return img
  
file_path: chainercv/chainercv/datasets/coco/coco_instances_base_dataset.py
imports: from collections import defaultdict
  import json
  import numpy
  import os
  import PIL.Image
  import PIL.ImageDraw
  from chainercv.chainer_experimental.datasets.sliceable import GetterDataset
  from chainercv.datasets.coco.coco_utils import get_coco
  from chainercv import utils
label_desc: Use image node_id 3 for calling the COCOInstancesBaseDataset obj's underlying member method code with example usage: obj._get_image(i) and returns: img