diff --git a/docs/DEVELOPER/performance-guide/data-transfer-apis.md b/docs/DEVELOPER/performance-guide/data-transfer-apis.md
index ba7571fe..fd6af9ae 100644
--- a/docs/DEVELOPER/performance-guide/data-transfer-apis.md
+++ b/docs/DEVELOPER/performance-guide/data-transfer-apis.md
@@ -152,6 +152,8 @@ This function may only be called on the render thread.
 
 Field observers are not notified when this function is called.
 
+Unlike direct field assignment, associative arrays passed via SetRef() may contain anonymous functions which can be pass callbacks and behavior between nodes.
+
 #### Parameters
 
 | **Name**   | **Type** | **Description**                                                    |