}
});
masterUnsetItem.addChangedHandler(new ChangedHandler() {
public void onChanged(ChangedEvent changedEvent) {
applyButton.enable();
if ((Boolean) changedEvent.getValue()) {
applyButton.focusInItem(); // unsetting value, nothing to enter so go to apply button
} else {
masterValueItem.focusInItem(); // if turning off "unset", go to value field to enter a value to set
}