code: def _transform_utterance(utterance, user_types):
      uid = utterance["userId"]
      t = user_types[uid]
      return ": ".join(
          [utterance["userId"] + "(" + t + ")", utterance["text"]]
      )
  
file_path: ParlAI/parlai/tasks/dialogue_qe/agents.py
imports: from parlai.core.teachers import DialogTeacher
  from parlai.utils.io import PathManager
  import parlai.utils.logging
  import os
  from parlai.tasks.dialogue_qe.build import build
label_desc: Use image node_id 3 for calling the DefaultTeacher obj's underlying member method code with example usage: obj._transform_utterance(utterance, user_types) and returns: str