protected function setMessageFormCheckout($key, $message)
    {
        gplcart_array_set($this->data_form['messages'], $key, $this->format($message));
    }
protected function setMessageFormCheckout($key, $message)
    {
        gplcart_array_set($this->data_form['messages'], $key, $this->format($message));
    }
protected function setMessageFormCheckout ( $ key , $ message ) { gplcart_array_set ( $ this -> data_form [ 'messages' ] , $ key , $ this -> format ( $ message ) ) ; }
Sets an array of messages on the checkout form
@param string $key
@param string|array $message
Sets an array of messages on the checkout form