class_docstr: Multiwoz Evaluator. Now, we support metrics `'bleu'`
      
code: def load_data(self, group):
      with open(f"dataset/multiwoz/{group}.json", "r") as f:
          self.data = json.load(f)
      self.turn_domains = [utt["turn_domain"] for utt in self.data]
  
file_path: TextBox/textbox/evaluator/multiwoz_evaluator.py
imports: import json
  from copy import deepcopy
  from .abstract_evaluator import AbstractEvaluator
  from .utils.multiwoz.config import Config
  from .utils.multiwoz.reader import MultiWozReader
  from .utils.multiwoz.eval import MultiWozEvaluator
label_desc: Use image node_id 2 for calling the MultiwozEvaluator obj's underlying member method code with example usage: obj.load_data(group) without return types