code: def load_data(self, domains) -> List[str]:
      data = []
      data_path = self.opt["datafile"]
      for domain in domains:
          for filename in glob.glob(
              f"{data_path}/{domain}/*.json", recursive=True
          ):
              with PathManager.open(filename, "r") as f:
                  example = json.load(f)
                  data.append(example)
      return data
  
imports: import glob
  import json
  import os
  import random
  import re
  from parlai.tasks.math_dataset.build import build
  from parlai.core.opt import Opt
  from parlai.core.params import ParlaiParser
  from parlai.utils.io import PathManager
  from typing import List, Optional
  from parlai.tasks.reasoning.agents import MWPStepsReasoningTeacher
label_desc: Use image node_id 3 for calling the MathDatasetStepByStepReasoningTeacher obj's underlying member method code with example usage: obj.load_data(domains) and returns: data