title: Is there a Facebook Share button event for FB.Event.subscribe?
body: <p>I'm looking to split test clicks between the Facebook Like button and Facebook Share button. I know I can attach an event handler of FB.Event.subscribe('edge.create',...) to track clicks on the Facebook like button, but is there a corresponding event for the Facebook share button? There doesn't appear to be on in the FB.Event.subscribe documentation.</p>