private void updateModel() {
   GuvWizardModel model = ((IGuvnorWizard) super.getWizard()).getModel();
   String selected = null;
   if (repLocations.getSelection().length > 0) {
     selected = repLocations.getSelection()[0];
   }
   if (selected != null) {
     model.setRepLocation(repLocations.getSelection()[0]);
   }
 }