title: Flutter - Navigate to a new screen, and clear all the previous screens
body: <p>I used <code>Navigator.push</code> up to 6 screens to get to the payment page. After Payment, I want to push to the "Payment Successful" page then remove all the previous screens i.e using the back button will return to the very first screen.</p>
  
  <p>NOTE: I have tried <code>pushReplacementNamed</code> and  it doesn't work.</p>