title: How to update Text() in Flutter
body: <p>How can I update a Text() using a RaisedButton?</p>
  
  <blockquote>
    <p>I need to run it without setState</p>
  </blockquote>
  
  <pre><code>RaisedButton(
    child: Text('Press Me To update Text !'),
    onPressed: (){
      changetext = 'it has been changed';
    },
  )
  </code></pre>
  
  <p>Thanks for helping me :)</p>