diff --git a/legacy.js b/legacy.js
index 4c26e02..9e59312 100644
--- a/legacy.js
+++ b/legacy.js
@@ -675,3 +675,7 @@ var LegacyExtension = class {
         }
     }
 };
+
+function init(metadata) {
+    return new LegacyExtension(metadata);
+}