code: def get_pc_path(self, ann, entity_index):
      if self.ds_name == "objaverse":
          return os.path.join(
              self.pc_root,
              ann["sample_ids"][entity_index],
              "{}_{}.npz".format(
                  ann["sample_ids"][entity_index], self.npoints
              ),
          )
  
imports: import os
  from collections import OrderedDict
  from PIL import Image
  import copy
  from lavis.datasets.datasets.base_dataset import BaseDataset
  from lavis.common.utils import is_serializable
label_desc: Use image node_id 9 for calling the DisCRnDataset obj's underlying member method code with example usage: obj.get_pc_path(ann, entity_index) and returns: os