code: def _crossproduct(template: CheckListTemplate):
      """
      Takes the output of editor.template and does the cross product of contexts and qas
      """
      ret = []
      ret_labels = []
      for instance in template.data:
          cs = instance["contexts"]
          qas = instance["qas"]
          d = list(itertools.product(cs, qas))
          ret.append([(x[0], x[1][0]) for x in d])
          ret_labels.append([x[1][1] for x in d])
      template.data = ret
      template.labels = ret_labels
      return template
  
imports: from typing import Optional, Iterable, Tuple, Union
  import itertools
  import numpy
  from checklist.editor import MunchWithAdd
  from checklist.test_suite import TestSuite
  from checklist.test_types import MFT
  from checklist.perturb import Perturb
  from allennlp.confidence_checks.task_checklists.task_suite import TaskSuite
  from allennlp.confidence_checks.task_checklists import utils
  from allennlp.predictors import Predictor
label_desc: Use image node_id 1 for calling a global function with example usage: _crossproduct(template) and returns: template