title: How to sort a string list alphabetically in Dart language?
body: <p>I have 4 companies and each company has more than 10 branches.
  If a user chooses a company, I need to show the selected company branch using <code>showDialog</code>. Till here everything work as expected. My problem is that I cannot sort <code>List&lt;String&gt;</code> alphabetically.</p>
  
  <p>Any idea how to sort string list (List) alphabetically in Dart?</p>
  
  <pre><code>List&lt;String&gt; _myBranchListName;
  </code></pre>