code: def _check_results(self):
      if not self._results_exist():
          raise (Exception("No results. Run run() first"))
  
imports: from abc import ABC, abstractmethod
  import dill
  from munch import Munch
  import numpy
  import inspect
  from .expect import iter_with_optional, Expect
  from .viewer.test_summarizer import TestSummarizer
label_desc: Use image node_id 14 for calling the AbstractTest obj's underlying member method code with example usage: obj._check_results() without return types