title: Dialog with three radio buttons in angular2 nativescript
body: <p>I am new to angular2 native script programming.. i want to  create a dialog with 3 radio buttons for my mobile app. i know there have some inbuilt dialogs like login,prompt,action...etc. i want 3 radio buttons on a dialog. how i can create such dialog? please help me out..<br>
  i tried the action dialog.. but there have no radio buttons.</p>
  
  <p>//simple action dialog</p>
  
  <pre><code>dialogs.action("Select Your Option", "Cancel", ["option 1", "option 2","option 3"]).then(res=&gt; {
                  console.log("Dialog result: " + res);
  </code></pre>