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 delete_comment(self):
        "Delete the selected comment"

        if self.get_selected_item()['type'] == 'Comment':
            self.delete_item()
        else:
            self.term.flash()