View file phpBB3/vendor/twig/twig/lib/Twig/Node.php

<?php

use Twig\Node\Node;

class_exists('Twig\Node\Node');

@trigger_error('Using the "Twig_Node" class is deprecated since Twig version 2.7, use "Twig\Node\Node" instead.', \E_USER_DEPRECATED);

if (false) {
    /** @deprecated since Twig 2.7, use "Twig\Node\Node" instead */
    class Twig_Node extends Node
    {
    }
}