* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @generated
*/
public NotificationChain basicSetP_type_reference(TypeReferenceAst newP_type_reference, NotificationChain msgs) {
TypeReferenceAst oldP_type_reference = p_type_reference;
p_type_reference = newP_type_reference;
if (eNotificationRequired()) {
ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, QvtAstPackage.TYPE_SPEC_AST__PTYPE_REFERENCE, oldP_type_reference, newP_type_reference);
if (msgs == null) msgs = notification; else msgs.add(notification);
}