title: How can I change the Size of the standard hamburger menu icon of a drawer in Flutter via theme
body: <p>While creating the theme:</p>
  
  <pre><code>appBarTheme: new AppBarTheme(
            iconTheme: base.appBarTheme.iconTheme.copyWith(size: 100, color: Colors.red), 
            //Color is working but size having no effect*
          ),
  </code></pre>