*/
public MMapModel() {
super();
addExtension(IUndoHandler.class, new UndoHandler());
this.setLockManager(ResourceController.getResourceController().getBooleanProperty(
"experimental_file_locking_on") ? new LockManager() : new DummyLockManager());
EventQueue.invokeLater(new Runnable() {
public void run() {
scheduleTimerForAutomaticSaving();
}
});