LevelOne levelOne = new LevelOne();
levelOne.mapKey = "levelOne";
levelOne.baseModel = base;
LevelTwo levelTwo = new LevelTwo();
levelTwo.mapKey = "levelTwo";
levelTwo.levelOne = levelOne;
levelOne.levelTwoMap.put(levelTwo.mapKey, levelTwo);
base.levelOneMap.put(levelOne.mapKey, levelOne);