code: def test_for_json_ignored_if_not_true_with_dict_subclass(self):
      for for_json in (None, False):
          self.assertRoundTrip(
              DictForJson(a=1), {"a": 1}, for_json=for_json
          )
  
imports: import unittest
  import simplejson
label_desc: Use image node_id 10 for calling the TestForJson obj's underlying member method code with example usage: obj.test_for_json_ignored_if_not_true_with_dict_subclass() without return types