From 3ec60e5ef301ef9db442c757afdb03cf3eb04597 Mon Sep 17 00:00:00 2001
From: Thomas Carney <thomas@chartmogul.com>
Date: Fri, 28 Feb 2020 12:43:58 +0000
Subject: [PATCH] Remove return type declaration (#61)

---
 src/Customer.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Customer.php b/src/Customer.php
index 062bb5b..56f2e6e 100644
--- a/src/Customer.php
+++ b/src/Customer.php
@@ -101,7 +101,7 @@ public function customAttributes()
      * @param string $externalId
      * @return Customer|null
      */
-    public static function findByExternalId($externalId): ?Customer
+    public static function findByExternalId($externalId)
     {
         if (gettype($externalId) == 'string') {
             $externalId = ['external_id' => $externalId];
@@ -113,7 +113,7 @@ public static function findByExternalId($externalId): ?Customer
             return null;
         }
 
-        return $response->first();
+        return $response->first() || null;
     }
 
     /**