diff --git a/editor/js/graph.js b/editor/js/graph.js
index 6987a65b667fdaae7aff75e56c8b79bc14a167c3..0f986084256fba9743ed04b3f8dcb7f6dc5b340c 100644
--- a/editor/js/graph.js
+++ b/editor/js/graph.js
@@ -24,7 +24,7 @@ const STOP_PHYSICS_DELAY = 5000; // ms
 
 const graph = {
     data: undefined,
-    externUpdate: [],
+    externUpdate: [],   // Register callbacks in this list
 
     update() {
         graph.externUpdate.forEach((fn) => fn());