From cd6c9715475b7a1ee4ec4d3600f745e0685a47eb Mon Sep 17 00:00:00 2001
From: jerry <jesse2061@outlook.com>
Date: Wed, 20 Jan 2021 16:45:50 +0800
Subject: [PATCH] update Singleton

---
 src/ZM/Utils/SingletonTrait.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ZM/Utils/SingletonTrait.php b/src/ZM/Utils/SingletonTrait.php
index a6649b61..1639fe83 100644
--- a/src/ZM/Utils/SingletonTrait.php
+++ b/src/ZM/Utils/SingletonTrait.php
@@ -11,6 +11,8 @@ trait SingletonTrait
      */
     private static $instance;
 
+    protected static $cached = [];
+
     /**
      * @return self
      */