FluentDOM\Query::has PHP Method

    public function has($selector)
    {
        $callback = $this->getSelectorCallback($selector);
        $result = $this->spawn();
        foreach ($this->_nodes as $node) {
            if ($selector instanceof \DOMElement) {
                $expression = './/*';
            } else {
                $expression = './/node()';
            }
            foreach ($this->xpath($expression, $node) as $has) {
                if ($callback($has)) {
                    $result->push($node);
                    break;
                }
            }
        }
        return $result;
    }