From ba6edc9b8c502b296262050e41fe17533727df48 Mon Sep 17 00:00:00 2001
From: CraftBukkit/Spigot <noreply+git-craftbukkit@papermc.io>
Date: Sat, 6 Oct 2018 10:17:06 +1000
Subject: [PATCH] SPIGOT-4411: Document use of null for shulker colours

By: md_5 <git@md-5.net>
---
 .../main/java/org/bukkit/craftbukkit/entity/CraftShulker.java | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftShulker.java b/paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftShulker.java
index 80bfa1bc5d..d25b742e75 100644
--- a/paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftShulker.java
+++ b/paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftShulker.java
@@ -35,8 +35,6 @@ public class CraftShulker extends CraftGolem implements Shulker {
 
     @Override
     public void setColor(DyeColor color) {
-        Preconditions.checkArgument(color != null, "color");
-
-        getHandle().getDataWatcher().set(EntityShulker.COLOR, color.getWoolData());
+        getHandle().getDataWatcher().set(EntityShulker.COLOR, (color == null) ? 16 : color.getWoolData());
     }
 }