title: MediaQuery.of(context).padding.top is returning 0.0 when I'm using it with appBar. Why is that?
body: <p>When I use <code>MediaQuery.of(context).padding.top</code> without the navBar in the widget tree then it returns me the actual true value.</p>
  <pre><code>Reloaded 1 of 529 libraries in 637ms.
  I/flutter (31730): 24.0
  </code></pre>
  <p>But when I place the appBar into the widget tree then it returns me 0.0 only.</p>
  <pre><code>Reloaded 1 of 529 libraries in 764ms.
  I/flutter (31730): 0.0
  </code></pre>
  <p>Can someone please help that why it is happening?</p>