NativeScript/tests/app/xml-declaration/mymodulewithxml/TabViewParentChainPage.ts

import { Label } from "@nativescript/core/ui/label";
import { Observable } from "@nativescript/core/data/observable";
import { Page } from "@nativescript/core/ui/page";

export function loaded(args) {
    (<Observable>(<Label>args.object).page.bindingContext).set("testPassed", true);
}

export function onNavigatingTo(args) {
    (<Page>args.object).bindingContext = args.context;
}