code: def _setup_data(self, path):
      print("loading: ", path)
      with PathManager.open(path) as data_file:
          self.examples = json.load(data_file)
  
imports: from parlai.core.teachers import FixedDialogTeacher
  from parlai.utils.io import PathManager
  from .build import build
  import json
  import os
label_desc: Use image node_id 7 for calling the DefaultTeacher obj's underlying member method code with example usage: obj._setup_data(path) without return types