def create_default_groups(self):
        for group in self.groups:
            group = group.replace(" ", "_").lower()
            self[group] = NamedRequirements(group)
def __init__(self, *args: Any, **kwargs: Any) -> None:
        self._smref: Union['ReferenceType[Submodule]', None] = None
        self._index = None
        self._auto_write = True
        super(SubmoduleConfigParser, self).__init__(*args, **kwargs)