FluentDOM\Nodes::prepareSelectorAsFilter PHP Метод

    private function prepareSelectorAsFilter($selector, $contextMode)
    {
        $filter = $this->prepareSelector($selector, $contextMode);
        if (preg_match('(^(/{0,2})([a-z-]+::.*))ui', $filter, $matches)) {
            $filter = $matches[2];
        } elseif (preg_match('(^(//?)(.*))', $filter, $matches)) {
            $filter = 'self::' . $matches[2];
        }
        return function ($node) use($filter) {
            return $this->xpath->evaluate($filter, $node)->length > 0;
        };
    }