import { Label } from '@nativescript/core/ui/label'; import { Page } from '@nativescript/core/ui/page'; export function onNavigateTo(args) { updateText(args.object); } export function changeFlatPropertyValue(args) { const page = args.object.page; page.actionBar.flat = !page.actionBar.flat; updateText(page); } function updateText(page: Page) { const label =