Class MyConf3

tests/config/test_configurable.py:257–263

        or_none_str = "or None"

        class MyConf3(Configurable):
            an_enum = CaselessStrEnum(
                "Choice1 choice2".split(),
                allow_none=True,
                default_value="choice2",
                help="Many choices.",
            ).tag(config=True)

        enum_choices_str = "Choices: any of ['Choice1', 'choice2'] (case-insensitive)"