Twig/lib/Twig/LoaderInterface.php

<?php

use Twig\Loader\LoaderInterface;

class_exists('Twig\Loader\LoaderInterface');

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

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