Update Twig to v2.15.4

system/libs/Twig/Extension/InitRuntimeInterface.php

@@ -11,6 +11,8 @@
 
 namespace Twig\Extension;
 
+use Twig\Environment;
+
 /**
  * Enables usage of the deprecated Twig\Extension\AbstractExtension::initRuntime() method.
  *
@@ -18,9 +20,17 @@ namespace Twig\Extension;
  * deprecated initRuntime() method in your extensions.
  *
  * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @deprecated since Twig 2.7, to be removed in 3.0
  */
 interface InitRuntimeInterface
 {
+    /**
+     * Initializes the runtime environment.
+     *
+     * This is where you can load some file that contains filter functions for instance.
+     */
+    public function initRuntime(Environment $environment);
 }
 
 class_alias('Twig\Extension\InitRuntimeInterface', 'Twig_Extension_InitRuntimeInterface');