/** * Send a reminder. Returns the updated invoice * @param Invoice $invoice * @param string $method Send method (email|hand|post); default: email * @param type $email Address to send to; default: contact e-mail * @param type $message * @return Invoice */ public function remind(Invoice $invoice, $method = 'email', $email = null, $message = null) { return $this->connector->remind($invoice, $this->buildEnvelope($method, $email, $message)); }