title: Dart Map : get the first key only
body: <pre><code>void main() { 
     var details = {'LastName':'Martin','FirstName':'Pierre'}; 
     print(details.keys); 
  }
  </code></pre>
  <p>It will produce the following output : (LastName, FirstName)</p>
  <p>But How can I print &quot;LastName&quot; only ?</p>