This is FUtil.

Lemon · web-flow · commit 54cf41f5a0c9 · 2017-06-09T19:06:25.000+05:00
diff --git a/src/main/java/me/totalfreedom/totalfreedommod/util/FUtil.java b/src/main/java/me/totalfreedom/totalfreedommod/util/FUtil.java
@@ -384,7 +384,7 @@ public static String rainbowify(String string)
             {
                 CHAT_COLOR_ITERATOR = CHAT_COLOR_POOL.iterator(); //Restart from first colour if there are no more colours in iterator.
             }
-            newString.append(FUtil.CHAT_COLOR_ITERATOR.next()).append(c);
+            newString.append(CHAT_COLOR_ITERATOR.next()).append(c);
         }
         
         return newString.toString();

Original file line number	Diff line number	Diff line change
`@@ -384,7 +384,7 @@ public static String rainbowify(String string)`
`384`	`384`	`{`
`385`	`385`	`CHAT_COLOR_ITERATOR = CHAT_COLOR_POOL.iterator(); //Restart from first colour if there are no more colours in iterator.`
`386`	`386`	`}`
`387`		`- newString.append(FUtil.CHAT_COLOR_ITERATOR.next()).append(c);`
	`387`	`+ newString.append(CHAT_COLOR_ITERATOR.next()).append(c);`
`388`	`388`	`}`
`389`	`389`
`390`	`390`	`return newString.toString();`