 
 import UIKit
 
-class ShowcaseExampleViewController: UIViewController {
+class ShowcaseExampleViewController: UIViewController, WatermarkedTextFieldDelegate {
     
     var departureCityField: WatermarkedTextField!
     var arrivalCityField: WatermarkedTextField!

    func setupArrivalCityField() {
        self.arrivalCityField = WatermarkedTextField()
        self.arrivalCityField.placeholder = "Arrival City"
        self.applySkyscannerTheme(self.arrivalCityField)
        self.view.addSubview(self.arrivalCityField)
    }

    func setupDepartureCityField() {
        self.departureCityField = WatermarkedTextField()
        self.departureCityField.placeholder = "Departure City"
        self.departureCityField.delegate = self
        self.applySkyscannerTheme(self.departureCityField)
        self.view.addSubview(self.departureCityField)
    }
