participation.setChangedBy(participation.getResult(), AccessControl.getUserView().getPerson());
participation.setChangedBy();
    public void run(ResultParticipation participation, OrderChange orderChange) {        switch (orderChange) {        case MoveUp:            participation.moveUp();            break;        case MoveDown:            participation.moveDown();            break;        case MoveTop:            participation.moveTop();            break;        case MoveBottom:            participation.moveBottom();            break;        }        participation.setChangedBy(participation.getResult(), AccessControl.getUserView().getPerson());    }