code: public static ReceiptTemplateBuilder addReceiptTemplate(
  			String recipientName, String orderNumber, String currency,
  			String paymentMethod) {
  		return new ReceiptTemplateBuilder(recipientName, orderNumber, currency,
  				paymentMethod);
  	}
docs: Adds a Receipt Template to the response.
  
  @param recipientName
  the recipient name. It can't be empty.
  @param orderNumber
  the order number. It can't be empty and it must be unique for
  each user.
  @param currency
  the currency for order. It can't be empty.
  @param paymentMethod
  the payment method details. This can be a custom string. ex:
  "Visa 1234". You may insert an arbitrary string here but we
  recommend providing enough information for the person to
  decipher which payment method and account they used (e.g., the
  name of the payment method and partial account number). It
  can't be empty.
  @return a builder for the response.
  @see <a href=
  "https://developers.facebook.com/docs/messenger-platform/send-api-reference/receipt-template"
  > Facebook's Messenger Platform Receipt Template Documentation</a>