code: def __getitem__(self, idx):
      sample = copy.deepcopy(self.sample_list[idx])
      # Inject thing_ids
      sample["thing_ids"] = copy.copy(self.thing_ids)
      if self.mode == "val":
          # Do not apply sync transforms on GT
          sample["gt_fields"] = []
      sample = self.transforms(sample)
      return sample
  
imports: import json
  import copy
  import os
  import numpy
  import paddle
  from paddleseg.transforms import Compose
  from paddlepanseg.cvlibs import build_info_dict
label_desc: Use image node_id 3 for calling the PanopticDataset obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: sample