Allow returning of the status code in the TransactionStatusResponse class

Author: Jelle van Oosterbosch

src/Message/TransactionStatusResponse.php

@@ -29,6 +29,14 @@ public function __construct(RequestInterface $request, $data, int $statusCode)
         $this->statusCode = $statusCode;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getCode()
+    {
+        return $this->statusCode;
+    }
+
     /**
      * {@inheritdoc}
      */