title: Google DFP dynamic ads refresh - is there a callback to find out if ads were loaded?
body: <p>On our site we're triggering ads refresh after user clicks on "next button" between slides:</p>
  
  <pre><code> googletag.pubads().refresh();
  </code></pre>
  
  <p>However if user clicks button real fast ads just keep reloading without never fully loading. 
  So my question is - is there a way to determine when ads were fully loaded? as in: is there some sort of an event I can bind into that's being called when ads fully load? But so far I cannot find anything like that in DFP api.</p>