Add getter for simple array of mobile numbers

src/Entity/Customer.php

@@ -116,6 +116,15 @@ class Customer
         return $this->numbers;
     }
 
+    public function getMobileNumberList()
+    {
+        $numbers = [];
+        foreach ($this->numbers as $number)
+            $numbers[] = $number->getID();
+
+        return $numbers;
+    }
+
     public function addMobileSession(MobileSession $session)
     {
         $this->sessions->add($session);