* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public NotificationChain basicSetP_helper_header(HelperHeaderAst newP_helper_header, NotificationChain msgs) {
HelperHeaderAst oldP_helper_header = p_helper_header;
p_helper_header = newP_helper_header;
if (eNotificationRequired()) {
ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, QvtAstPackage.HELPER_AST__PHELPER_HEADER, oldP_helper_header, newP_helper_header);
if (msgs == null) msgs = notification; else msgs.add(notification);
}