From cdb28f956e5cab941cf66e94238ca7e5be23c1a0 Mon Sep 17 00:00:00 2001
From: Luke Barnard <lukeb@openmarket.com>
Date: Thu, 31 Aug 2017 16:29:31 +0100
Subject: [PATCH] Add comment for StickyContainer extension

---
 src/components/structures/ScrollPanel.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/components/structures/ScrollPanel.js b/src/components/structures/ScrollPanel.js
index cbd2954918..abb9ddff49 100644
--- a/src/components/structures/ScrollPanel.js
+++ b/src/components/structures/ScrollPanel.js
@@ -117,7 +117,11 @@ export default class ScrollPanel extends StickyContainer {
         debuglog("Scroll event: offset now:", sn.scrollTop,
                  "_lastSetScroll:", this._lastSetScroll);
 
+        // Set the node and notify subscribers of the StickContainer
+        // By extending StickyContainer, we can set the scroll node to be that of the
+        // ScrolPanel to allow any `<Sticky>` children to be sticky, namely DateSeparators.
         this.node = sn;
+        // Update subscribers - arbitrarily nested `<Sticky>` children
         this.notifySubscribers(ev);
 
         // Sometimes we see attempts to write to scrollTop essentially being