@Override
public void undo() {
commandMemento.undo();
}
@Override
public void remove(String id) {
User remove = registry.remove(id);
notifyDel(remove);
commandMemento.setUndoCommand(new AddCommand(new AddCommandArgumentsValidator(remove)));
}
@Override
public void put(User user) {
registry.put(user.getId(), user);
notifyAdd(user);
commandMemento.setUndoCommand(new DelCommand(user.getId()));
}