From bd7ecc3b06b63f1afa6655ff16f39f6089ac6143 Mon Sep 17 00:00:00 2001
From: DannyS712 <DannyS712.enwiki@gmail.com>
Date: Wed, 30 Sep 2020 16:45:19 +0000
Subject: [PATCH] ApiEditPage: Document that it is extended

To avoid future issues like T264200

Bug: T264200
Change-Id: I0eafbad96be5037fb7795559fe6a62e69d54f0c5
---
 includes/api/ApiEditPage.php | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/includes/api/ApiEditPage.php b/includes/api/ApiEditPage.php
index 36b8a091ae7..a93b5e7c6f8 100644
--- a/includes/api/ApiEditPage.php
+++ b/includes/api/ApiEditPage.php
@@ -32,6 +32,13 @@ use MediaWiki\Revision\SlotRecord;
  * EditPage.php should be rewritten to provide a cleaner interface,
  * see T20654 if you're inspired to fix this.
  *
+ * WARNING: This class is //not// stable to extend. However, it is
+ * currently extended by the ApiThreadAction class in the LiquidThreads
+ * extension, which is deployed on WMF servers. Changes that would
+ * break LiquidThreads will likely be reverted. See T264200 for context
+ * and T264213 for removing LiquidThreads' unsupported extending of this
+ * class.
+ *
  * @ingroup API
  */
 class ApiEditPage extends ApiBase {