'Checks that the "add missing groups" button/link is not present.'

def verify_add_missing_groups_button_not_present(self, container):

    def missing_groups_button_not_present():
        button_present = container.missing_groups_button_present()
        return ((not button_present), (not button_present))
    Promise(missing_groups_button_not_present, 'Add    missing    groups    button    should    not    be    showing.').fulfill()
