title: Is it possible to change the default animation of showGeneralDialog() in flutter?
body: <p>I'm trying to customize a showGeneralDialog to show my Transform.scale animation. I'm just wondering if there is a way to change the default animation of the widget to a curved animation? </p>
  
  <p>like a1 and a2 within:</p>
  
  <pre><code>      transitionBuilder: (context, a1, a2, widget) {
  </code></pre>
  
  <p>For example, I would like the <code>Transform.scale</code> to have a <code>bounceIn</code> effect.</p>
  
  <p>Also, could someone please explain the difference between <code>transitionBuilder: (context, a1, a2, widget) {}</code> and <code>pageBuilder: (context, animation1, animation2) {}</code> for the showGeneralDialog widget? And how do I properly use them?</p>
  
  <p>Thanks!</p>