From cd48cb18874f328e0df98b21a8d63defe71ddbfb Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Fri, 6 Apr 2018 15:17:39 +0900
Subject: [PATCH] Add comment

---
 .../Screens/Edit/Screens/Compose/Layers/HitObjectMaskLayer.cs   | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/osu.Game/Screens/Edit/Screens/Compose/Layers/HitObjectMaskLayer.cs b/osu.Game/Screens/Edit/Screens/Compose/Layers/HitObjectMaskLayer.cs
index 88f865be20..423cf0ed29 100644
--- a/osu.Game/Screens/Edit/Screens/Compose/Layers/HitObjectMaskLayer.cs
+++ b/osu.Game/Screens/Edit/Screens/Compose/Layers/HitObjectMaskLayer.cs
@@ -21,7 +21,9 @@ namespace osu.Game.Screens.Edit.Screens.Compose.Layers
 
         public HitObjectMaskLayer(Playfield playfield, HitObjectComposer composer)
         {
+            // we need the playfield as HitObjects may not be initialised until its BDL.
             this.playfield = playfield;
+
             this.composer = composer;
 
             RelativeSizeAxes = Axes.Both;