Implements @else

def _do_else(self, rule, p_selectors, p_parents, p_children, scope, media, c_lineno, c_property, c_codestr, code, name):
        """
        Implements @else
        """
        if '@if' not in rule[OPTIONS]:
            log.error("@else with no @if (%s", rule[INDEX][rule[LINENO]])
        val = rule[OPTIONS].pop('@if', True)
        if not val:
            rule[CODESTR] = c_codestr
            self.manage_children(
                rule, p_selectors, p_parents, p_children, scope, media)