def _get_error_message(self, lease):
        try:
            return self.invoke_api(vim_util,
                                   'get_object_property',
                                   self.vim,
                                   lease,
                                   'error')
        except exceptions.VimException:
            LOG.warning(_LW("Error occurred while reading error message for "
                            "lease: %s."),
                        lease,
                        exc_info=True)
            return "Unknown"
Checks data type of each field of each story from best page
dataset/ETHPy150Open openstack/oslo.vmware/oslo_vmware/api.py/VMwareAPISession._get_error_message--crossover with--dataset/ETHPy150Open karan/HackerNewsAPI/tests/test_stories_dict_structure.py/TestStoriesDict.test_stories_dict_structure_best