root = Card([header, form])
header = CardHeader("Where should we go for lunch on Friday?")
formButtons = Buttons([submitBtn])
form = Form("lunch-poll", formButtons, [formControl])
formControl = FormControl("Select a restaurant", radioGroup)
radioGroup = RadioGroup("restaurant", [restaurant1, restaurant2, restaurant3])
submitBtn = Button("Submit", null, "primary")
restaurant1 = RadioItem("Pizza Place", "", "pizza")
restaurant2 = RadioItem("Taco Bell", "", "taco")
restaurant3 = RadioItem("Sushi Spot", "", "sushi")