def METHOD_NAME(config):
    config.register(
        [
            ConfigSection(
                "extra_plugin",
                [
                    ConfigEntry("some", str),
                    ConfigEntry("config", str),
                    ConfigEntry("has_default", str, "iamdefault"),
                ],
            )
        ]
    )
    assert config.extra_plugin_some == 'testvalue'
    assert config.extra_plugin_config == 'othervalue'
    assert config.extra_plugin_has_default == 'iamdefault'
    config._config_map.pop()