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 visitdir(self, dir):
        dir = normalizerootdir(dir, "visitdir")
        matched = self._matcher.match_relative(dir, True)
        if matched:
            # Everything in the directory is selected (ignored)
            return "all"
        else:
            # Not sure
            return True