         expirationTextField.delegate = self
         cvcTextField.delegate = self
         cardHolderTextField.delegate = self
-        
+
         formContentView.addArrangedSubview(cardNumberTextField)
         formContentView.addArrangedSubview(expirationTextField)
         formContentView.addArrangedSubview(cvcTextField)
         formContentView.addArrangedSubview(cardHolderTextField)
-        
+
         formScrollView.contentSize = CGSize(width: pageWidth * CGFloat(4), height: textFieldHeight)
     }
 

                                                        y: 0.0,
                                                        width: textFieldWidth,
                                                        height: textFieldHeight))
        
        cardNumberTextField.borderStyle = .roundedRect
        expirationTextField.borderStyle = .roundedRect
        cvcTextField.borderStyle = .roundedRect
        cardHolderTextField.borderStyle = .roundedRect
        
        // placeholder
        cardNumberTextField.attributedPlaceholder = NSAttributedString(
            string: "payjp_card_form_number_placeholder".localized,

        }

        backgroundColor = .clear

        setupFormLayout()

        // set images
