* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public NotificationChain basicSetP_unit(UnitAst newP_unit, NotificationChain msgs) {
UnitAst oldP_unit = p_unit;
p_unit = newP_unit;
if (eNotificationRequired()) {
ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, QvtAstPackage.IMPORT_AST__PUNIT, oldP_unit, newP_unit);
if (msgs == null) msgs = notification; else msgs.add(notification);
}