From b1f0a49e7f3235d2544ff3430fffe46a4e3271bf Mon Sep 17 00:00:00 2001
From: Keshav Varadachari <keshavvi@google.com>
Date: Wed, 12 Jan 2022 10:13:15 -0500
Subject: [PATCH] add doc

---
 src/preact/amp-base-element.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/preact/amp-base-element.js b/src/preact/amp-base-element.js
index 2c9aeaae4ad55..4220dc68b5153 100644
--- a/src/preact/amp-base-element.js
+++ b/src/preact/amp-base-element.js
@@ -105,7 +105,9 @@ export class AmpPreactBaseElement extends PreactBaseElement {
 }
 
 /**
- *
+ * Changes the inheritance hierarchy of X such that it now extends from Y.
+ * If X previously inherited from Z, it now no longer does so.
+ * Dangerous, use sparingly!
  * @param {*} X
  * @param {*} Y
  * @return {*}