JsonableException::to_json PHP Method

    public function to_json()
    {
        return array('message' => $this->message, 'code' => $this->code);
    }

 public function to_json()
 {
     return array_merge(parent::to_json(), array('codes' => $this->wp_error->get_error_codes(), 'messages' => $this->wp_error->get_error_messages()));
 }