title: How can I put an icon inside a snackbar using flutter
body: <p>I am new to flutter, I don't know if it is possible to do this. I would like to put an icon on the left side of the text.    </p>
  
  <pre><code>SnackBar(    
    backgroundColor: Colors.red,
    content: Text(_accion_toast + ". " + mensaje),
    duration: Duration(milliseconds: 1500),
  );
  </code></pre>