Save method now returns false if no elements mutated.

src/Services/ServiceCollection.php

@@ -115,7 +115,7 @@ public function filter($callback)
 
     /**
      * Persist values in google.
-     * @return mixed
+     * @return false|mixed
      */
     public function save()
     {
@@ -129,6 +129,9 @@ public function save()
           $operations[] = $operation;
         });
 
+        if(empty($operations))
+            return false;
+
         return $this->adWordsServices->mutate($operations);
     }