title: How do you specify the origin of the arrow on a popover segue with OS X 10.10 storyboards
body: <p>I'm playing around with storyboarding in an OS X 10.10 app.  I have an <code>NSTableView</code> that, when you click a specific row opens a segue that goes to a popover that contains an <code>NSViewController</code>.</p>
  
  <p>How do you specify the origin <code>NSPoint</code> of the arrow for the popover?  Right now, it just points to the <code>NSTableView</code> in the middle.  I assumed that I could do this in <code>prepareForSegue</code>, but I can't seem to figure it out.  <code>prepareForSegue</code> doesn't seem to have an understanding that the <code>NSViewController</code> is contained in an <code>NSPopover</code></p>
  
  <p>Any ideas?</p>