title: Flutter: How to set and lock screen orientation on-demand
body: <p>On one of my flutter pages, I need the screen to set to landscape mode and lock it so it can't rotate into portrait mode, but only on the one page. So need a way to enable this function on-the-fly. Anyone know how to do this?</p>
  
  <p>I would like it to rotate landscape-left or landscape-right, just not into portrait mode.</p>