def __init__(self, groups=None):
        super(GroupedRequirements, self).__init__(NamedRequirements)
        self.groups = groups or self.default_groups
        self.filename = None
        self.create_default_groups()
def sm_section(name: str) -> str:
    """:return: section title used in .gitmodules configuration file"""
    return f'submodule "{name}"'