title: Tela que atualiza horário automaticamente flutter
body: <p>Good afternoon</p>
  <p>I'm trying to run a test application from code</p>
  <p>When I extend the State it gives an error in the code call and when I extend the <strong>StatelessWidget</strong> it does not give an error in the call but it gives an error in my <strong>'StateMyApp'</strong>. coloquei State Myapp mais é . Quando eu coloco entre as &lt;&gt; a palavra some</p>
  <p><strong>where do i call the code</strong></p>
  <pre><code>return Stack(
       fit: StackFit.loose,
       children: [
      PlaceholderHorarioMarcacoes(),
  </code></pre>
  <p><strong>Error adding StatelessWidget</strong></p>
  <pre><code>class MyApp extends StatefulWidget {
    @override
    PlaceholderHorarioMarcacoes createState() =&gt; PlaceholderHorarioMarcacoes();
  }
  
  class PlaceholderHorarioMarcacoes extends StatelessWidget{
    String _timeString;
  </code></pre>
  <p><strong>[Error giving State][3]</strong></p>
  <pre><code>class MyApp extends StatefulWidget {
    @override
    PlaceholderHorarioMarcacoes createState() =&gt; PlaceholderHorarioMarcacoes();
  }
  
  class PlaceholderHorarioMarcacoes extends State&lt;MyApp&gt;{
    String _timeString;
  </code></pre>
  <p>}</p>