* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public NotificationChain basicSetP_unary_op(UnaryOpAst newP_unary_op, NotificationChain msgs) {
UnaryOpAst oldP_unary_op = p_unary_op;
p_unary_op = newP_unary_op;
if (eNotificationRequired()) {
ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, QvtAstPackage.UNARY_UNARY_EXP_AST__PUNARY_OP, oldP_unary_op, newP_unary_op);
if (msgs == null) msgs = notification; else msgs.add(notification);
}