title: Try correcting to the name of an existing method, or defining a method named 'OutlineButton' in flutter 3.0.0. it isn't defined for the type
body: <p>I've installed <code>flutter 3.0.0</code>. Now I'm getting error that <code>OutlinedButton</code> isn't defined for the type.</p>
  <p><strong>Error:</strong></p>
  <blockquote>
  <p>Method not found: 'OutlineButton'. lib/appUtils/app_utility.dart:233</p>
  <p>OutlineButton(
  ^^^^^^^^^^^^^ : Error: Method not found: 'OutlineButton'. lib/appUtils/app_utility.dart:255
  OutlineButton(</p>
  <p>^^^^^^^^^^^^^</p>
  </blockquote>