void () { myNotNulls.removeAll(myDefaultNullables.keySet()); myNullables.removeAll(myDefaultNotNulls.keySet()); myNullables.addAll(ContainerUtil.filter(myDefaultNullables.keySet(), s -> !myNullables.contains(s))); myNotNulls.addAll(ContainerUtil.filter(myDefaultNotNulls.keySet(), s -> !myNotNulls.contains(s))); myTracker.incModificationCount(); }