 		updateSummary()
 	}
 
+	// MARK: Collapse / expand
+	
+	lazy var userName: TextFieldFormItem = {
+		let instance = TextFieldFormItem()
+		instance.title("User Name").placeholder("required")
+		instance.keyboardType = .ASCIICapable
+		instance.autocorrectionType = .No
+		return instance
+	}()
+	
 	lazy var toggleDatePicker0: DatePickerFormItem = {
 		let instance = DatePickerFormItem()
 		instance.title("Toggle 0")

		builder += summary

		builder += SectionFormItem()
		builder += toggleDatePicker0
		builder += toggleDatePicker1
		builder += toggleDatePicker2

	override func populate(builder: FormBuilder) {
		builder.navigationTitle = "DatePicker & Bindings"
		builder.toolbarMode = .Simple
		builder += SectionHeaderTitleFormItem(title: "Always expanded")
		builder += datePicker
		builder += incrementButton
		builder += decrementButton
