* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public NotificationChain basicSetMask(Group newMask, NotificationChain msgs) {
Group oldMask = mask;
mask = newMask;
if (eNotificationRequired()) {
ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, FxgPackage.LINE__MASK, oldMask, newMask);
if (msgs == null) msgs = notification; else msgs.add(notification);
}