public void childMapNLevelUpdateTest() {
OObjectDatabaseTx database = OObjectDatabasePool.global().acquire(url, "admin", "admin");
Planet jupiter = database.newInstance(Planet.class);
jupiter.setName("Jupiter");
jupiter.setDistanceSun(3000);
Planet mercury = database.newInstance(Planet.class);
mercury.setName("Mercury");
mercury.setDistanceSun(5000);
Satellite jupiterMoon = database.newInstance(Satellite.class);
Satellite mercuryMoon = database.newInstance(Satellite.class);
jupiterMoon.setDiameter(50);