livingParts = new HashSet<LivingPart>();
trees = new HashSet<Tree>();
fallenLeaves = new HashSet<TreeLeaf>();
creationMillis = 0;
environment = new MockEnvironment();
physics = new MockPhysics();
synchronizer = new MockSynchronizerCore();
date = new SimLifeDate();
universe3D = new MockUniverse3D();
state = new UniverseState();
synchronizedCalled = 0;