PhpCss\Ast\Selector\Group::accept PHP Method

    public function accept(Ast\Visitor $visitor)
    {
        if ($visitor->visitEnter($this)) {
            /**
             * @var Sequence $sequence
             */
            foreach ($this as $sequence) {
                $sequence->accept($visitor);
            }
            return $visitor->visitLeave($this);
        }
        return NULL;
    }