From 59a986546cbba7c35bc9020fd8f50a743f228b24 Mon Sep 17 00:00:00 2001
From: Jan Petykiewicz <jan@mpxd.net>
Date: Mon, 6 Feb 2023 19:00:56 -0800
Subject: [PATCH] missing import

---
 masque/library.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/masque/library.py b/masque/library.py
index 889d945..9b88e55 100644
--- a/masque/library.py
+++ b/masque/library.py
@@ -1042,6 +1042,7 @@ class Tree(MutableLibrary):
 
     @classmethod
     def mk(cls, top: str) -> Tuple['Tree', 'Pattern']:
+        from .pattern import Pattern
         tree = cls(top=top)
         pat = Pattern()
         tree[top] = pat