View file phpBB3/vendor/twig/twig/lib/Twig/NodeVisitor/Optimizer.php

<?php

use Twig\NodeVisitor\OptimizerNodeVisitor;

class_exists('Twig\NodeVisitor\OptimizerNodeVisitor');

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

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