added getLoaders() on the chain loader

CHANGELOG

@@ -1,5 +1,6 @@
 * 1.38.0 (2019-XX-XX)
 
+ * added Twig\Loader\ChainLoader::getLoaders()
  * changed internal code to use the namespaced classes as much as possible
 
 * 1.37.1 (2019-01-14)

lib/Twig/Loader/Chain.php

@@ -43,6 +43,14 @@ class Twig_Loader_Chain implements LoaderInterface, Twig_ExistsLoaderInterface,
         $this->hasSourceCache = [];
     }
 
+    /**
+     * @return array
+     */
+    public function getLoaders()
+    {
+        return $this->loaders;
+    }
+
     public function getSource($name)
     {
         @trigger_error(sprintf('Calling "getSource" on "%s" is deprecated since 1.27. Use getSourceContext() instead.', \get_class($this)), E_USER_DEPRECATED);