title: Flutter how to get subtext aligned under title in appbar?
body: <p>I have the following app bar in flutter and trying to align the subtext "Your desired business name" under the title enter. I have tried different methods but still can't get to align. It should have "enter" at the top and then the subtext aligned center   </p>
  
  <p><a href="https://i.stack.imgur.com/0FFjv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/0FFjv.png" alt="enter image description here"></a></p>
  
  <p>Here is my current code</p>
  
  <pre><code>Widget build(BuildContext context) {
      return Scaffold(
        appBar: PreferredSize(
            preferredSize: Size.fromHeight(75.0), 
            child: AppBar(
              centerTitle: true,
              title: Text('enter'),
              actions: &lt;Widget&gt;[
                new Container(),
                new Center(
                    child: Text(
                  'Your desired business name',
                  textAlign: TextAlign.center,
                  style: new TextStyle(
                    fontSize: 14.0,
                    color: Colors.white,
                  ),
                )),
              ],
            )),  
      );
    }
  </code></pre>