class_docstr: Abstract data loader.
class_docstr_tok: ["Abstract","data","loader","."]
code: def _label_fold(self, chunks):
      return chunks.conversation_id.apply(self._h)
  
imports: from parlai.core.params import ParlaiParser
  import os
  import pandas
  from parlai.core.opt import Opt
  import parlai.core.tod.tod_core
  import json
  from typing import Optional
  from parlai.utils.data import DatatypeHelper
  from parlai.utils.io import PathManager
  import parlai.tasks.taskmaster3.build
  import parlai.core.tod.tod_agents
label_desc: Use image node_id 10 for calling the Taskmaster3Parser obj's underlying member method code with example usage: obj._label_fold(chunks) and returns: chunks