/** @since Available in iOS 4.1 and later. */
 public NSURL getReferenceURL() {
   if (has(Keys.ReferenceURL())) {
     NSURL val = (NSURL) get(Keys.ReferenceURL());
     return val;
   }
   return null;
 }
 /** @since Available in iOS 4.1 and later. */
 public UIImagePickerControllerEditingInfo setReferenceURL(NSURL referenceURL) {
   set(Keys.ReferenceURL(), referenceURL);
   return this;
 }