* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public NotificationChain basicSetP_or_op(OrOpAst newP_or_op, NotificationChain msgs) {
OrOpAst oldP_or_op = p_or_op;
p_or_op = newP_or_op;
if (eNotificationRequired()) {
ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, QvtAstPackage.OR_OR_EXP_AST__POR_OP, oldP_or_op, newP_or_op);
if (msgs == null) msgs = notification; else msgs.add(notification);
}