https://airflow.apache.org/docs/apache-airflow/stable/configurations-ref.html#store-dag-code

![Captura de pantalla 2021-05-26 a las 17 47 56](https://user-images.githubusercontent.com/11339132/119691160-a2049a00-be4a-11eb-8f55-0ad2c6117620.png)

The Default is True or None?
tests/core/test_configuration.py
conf.deprecated_options[('celery', "result_backend")] = 'celery', 'celery_result_backend', '2.0.0'
        conf.sensitive_config_values.add(('celery', 'celery_result_backend'))
        conf.remove_option('celery', 'result_backend')
        with conf_vars({('celery', 'celery_result_backend_cmd'): '/bin/echo 99'}):
            with pytest.warns(DeprecationWarning):
                tmp = None
                if 'AIRFLOW__CELERY__RESULT_BACKEND' in os.environ:
                    tmp = os.environ.pop('AIRFLOW__CELERY__RESULT_BACKEND')
                assert conf.getint('celery', 'result_backend') == 99
                if tmp:
                    os.environ['AIRFLOW__CELERY__RESULT_BACKEND'] = tmp
    def test_deprecated_values(self):