* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public NotificationChain basicSetP_and_op(AndOpAst newP_and_op, NotificationChain msgs) {
AndOpAst oldP_and_op = p_and_op;
p_and_op = newP_and_op;
if (eNotificationRequired()) {
ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, QvtAstPackage.AND_AND_EXP_AST__PAND_OP, oldP_and_op, newP_and_op);
if (msgs == null) msgs = notification; else msgs.add(notification);
}