title: Get name of clicked submit button in grails
body: <p>On a form I have two submit buttons:</p>
  
  <pre><code>&lt;g:submitButton name="add" value="Add"/&gt;
  &lt;g:submitButton name="addAnother" value="Add and Create Another"/&gt;
  </code></pre>
  
  <p>I need to take slightly different action based on which button was used to submit the form.  How to I get the name of the clicked button in my controller?</p>