NativeScript/e2e/ui-tests-app/app/tabs/second-page.ts

import { EventData, Button } from "@nativescript/core";

export function goToFirst(args: EventData) {
  console.log("---> goToFirst Page");
  const button = <Button>args.object;
  button.page.frame.navigate("tabs/first-page");
}

export function goBack(args: EventData) {
  console.log("---> goBack");
  const button = <Button>args.object;
  button.page.frame.goBack();
}