diff --git a/src/structures/Tree.ts b/src/structures/Tree.ts
index 6f0ef6b..15b6328 100644
--- a/src/structures/Tree.ts
+++ b/src/structures/Tree.ts
@@ -52,9 +52,10 @@ import {
   listInsert,
   listAppend,
   listRemove,
+  listRemoveFirst,
   listInsertBefore,
   listInsertAfter,
-  listIterateFromFirst, listRemoveFirst,
+  listIterateFromFirst,
 } from '@/structures'
 
 import {