title: awakeFromFetch with non-managed property
body: <p>I have an NSManagedObject subclass with some image data in an NSData property (<code>imageData</code>), which is automatically persisted. After loading the data from the network I also set a custom NSImage property (<code>image</code>) with an image created from the data.</p>
  
  <p>The problem is that if the object is a fault, <code>awakeFromFetch</code> is <strong>not</strong> called when I access the <code>image</code> property, since it is not handled by Core Data. I can of course override the <code>image</code> accessor and make sure the properties are loaded (by accessing <code>imageData</code>) but it would be nice if there was a way to have <code>awakeFromFetch</code> invoked as normal. Any suggestions?</p>