From 4c95561040cbfc7e51ca95f965c856f99c4814e4 Mon Sep 17 00:00:00 2001
From: samsamson33 <ebonycat33@gmail.com>
Date: Thu, 27 Feb 2020 10:10:12 -0500
Subject: [PATCH] Revert "fix(Structures): allow multiple extensions by
 checking prototype chain (#3217)"

This reverts commit 33ede42806694ce158900422c6f67b91daf8ba43.
---
 src/util/Structures.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/util/Structures.js b/src/util/Structures.js
index 2dc26770f254..5cdfc831a47f 100644
--- a/src/util/Structures.js
+++ b/src/util/Structures.js
@@ -55,8 +55,8 @@ class Structures {
       throw new TypeError(`The extender function must return the extended structure class/prototype ${received}.`);
     }
 
-    if (!(extended.prototype instanceof structures[structure])) {
-      const prototype = Object.getPrototypeOf(extended);
+    const prototype = Object.getPrototypeOf(extended);
+    if (prototype !== structures[structure]) {
       const received = `${extended.name || 'unnamed'}${prototype.name ? ` extends ${prototype.name}` : ''}`;
       throw new Error(
         'The class/prototype returned from the extender function must extend the existing structure class/prototype' +