class_docstr: Abstract data loader.
class_docstr_tok: ["Abstract","data","loader","."]
code: def _get_utterance_and_apis_for_speaker(
      self, speaker, utterances, idx
  ):
      utts = []
      calls = []
      responses = []
      while idx < len(utterances):
          here = utterances[idx]
          if here["speaker"] != speaker:
              break
          utts.append(here["text"])
          here_calls, here_responses = self._parse_apis_to_slots(
              here.get("apis", [])
          )
          calls += here_calls
          responses += here_responses
          idx += 1
      return idx, "\n".join(utts), calls, responses
  
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 5 for calling the Taskmaster3Parser obj's underlying member method code with example usage: obj._get_utterance_and_apis_for_speaker(speaker, utterances, idx) and returns: idx,  str,  calls,  responses