QueryPath\CSS\DOMTraverser::matchPseudoElements PHP Method

    protected function matchPseudoElements($node, $pseudoElements)
    {
        if (empty($pseudoElements)) {
            return true;
        }
        foreach ($pseudoElements as $pse) {
            switch ($pse) {
                case 'first-line':
                case 'first-letter':
                case 'before':
                case 'after':
                    return strlen($node->textContent) > 0;
                case 'selection':
                    throw new \QueryPath\CSS\NotImplementedException("::{$name} is not implemented.");
            }
        }
    }