title: How to use multiple navigators
body: <p>I currently have a <code>MaterialApp</code> in my flutter application which makes the use of the <code>Navigator</code> extremely easy, which is great. But, I'm now trying to figure out how to create more navigators for particular views/widgets. For example I've got a custom tab bar with another widget/view in. I'd now like that widget/view to have it's own navigation stack. So the goal is to keep the tab bar at the top while I navigate to other pages from within my widget/view.<br>
  This question is almost exactly this: <a href="https://stackoverflow.com/questions/45511549/permanent-view-with-navigation-bar-in-flutter">Permanent view with navigation bar in Flutter</a> but in that code, there is no <code>MaterialApp</code> yet. Nesting <code>MaterialApp</code>s give funky results and I don't believe that that would be a solution.<br>
  <a href="https://i.stack.imgur.com/skwky.png" rel="noreferrer"><img src="https://i.stack.imgur.com/skwky.png" alt="enter image description here"></a></p>
  
  <p>Any ideas?</p>