     /**
      Delegate method that is triggered when the date input field has found a valid date
      
-     - parameter input: the input field calling the delegate method
-     - parameter date:  the valid date that has been entered
+     - parameter input: The input field calling the delegate method
+     - parameter date:  The valid date that has been entered
      */
     public func dateInput(input: DateInputField, didFindValidDate date: String) {
         if input == self.startDateInputField {

     
     - Discussion: Maestro cards need a start date or an issue number to be entered for making any transaction
     
     - parameter isVisible: whether start date and issue number fields should be visible
     */
    public func toggleStartDateVisibility(isVisible: Bool) {
        self.maestroFieldsHeightConstraint?.constant = isVisible ? inputFieldHeight : 0

    
    
    /**
    Delegate method that is triggered when the billing country input field selected a billing country
    
    - parameter input:          The input field calling the delegate method
    - parameter billingCountry: The billing country that has been selected
    */
    public func billingCountryInputDidEnter(input: BillingCountryInputField, billingCountry: BillingCountry) {
        self.postCodeInputField.billingCountry = billingCountry
