From 31fa15afe32e4c3998f7c4efbde9a5ca26335572 Mon Sep 17 00:00:00 2001
From: Lukas Bombach <lukas.bombach@googlemail.com>
Date: Fri, 17 Aug 2018 12:28:27 +0200
Subject: [PATCH] Add property check for

---
 src/index.js | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/index.js b/src/index.js
index 1fa6f36d..fe82b7f0 100644
--- a/src/index.js
+++ b/src/index.js
@@ -123,14 +123,16 @@ export function install (Vue, options) {
   }
 
   // Lazy creation
-  Object.defineProperty(Vue.prototype, '$apollo', {
-    get () {
-      if (!this._apollo) {
-        this._apollo = new DollarApollo(this)
-      }
-      return this._apollo
-    },
-  })
+  if (!Vue.prototype.hasOwnProperty('$apollo')) {
+    Object.defineProperty(Vue.prototype, '$apollo', {
+      get () {
+        if (!this._apollo) {
+          this._apollo = new DollarApollo(this)
+        }
+        return this._apollo
+      },
+    })
+  }
 
   const vueVersion = Vue.version.substr(0, Vue.version.indexOf('.'))