guides/projects/priceservice/vendor/symfony/maker-bundle/templates/twig/Runtime.tpl.php

<?= "<?php\n" ?>

namespace <?= $namespace; ?>;

<?= $use_statements ?>

class <?= $class_name ?> implements RuntimeExtensionInterface
{
    public function __construct()
    {
        // Inject dependencies if needed
    }

    public function doSomething($value)
    {
        // ...
    }
}