private void updateFieldProgressMessageEnablement(boolean buttonEnabled) {
   boolean enable = (fAddMessageButton.getSelection() && buttonEnabled);
   for (Control messageControl : fMessageControls) {
     messageControl.setEnabled(enable);
   }
 }
 private void updateFieldProgressBarEnablement(boolean buttonEnabled) {
   boolean enable = (fAddBarButton.getSelection() && buttonEnabled);
   for (Control barControl : fBarControls) {
     barControl.setEnabled(enable);
   }
 }