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
test_cmdenv_config = '''[testcmdenv]
itsacommand = NOT OK
notacommand = OK
'''
        test_cmdenv_conf = AirflowConfigParser()
        test_cmdenv_conf.read_string(test_cmdenv_config)
        test_cmdenv_conf.sensitive_config_values.add(('testcmdenv', 'itsacommand'))
        with unittest.mock.patch.dict('os.environ'):
            
            
            
            assert test_cmdenv_conf.get('testcmdenv', 'itsacommand') == 'OK'
            
            
            
            assert test_cmdenv_conf.get('testcmdenv', 'notacommand') == 'OK'
    def test_parameterized_config_gen(self):