- protected abstract class VPB extends LazyViewpoint implements Callable<Boolean>, IChildrenCallback {\r
- public VPB(PrimitiveQueryUpdater updater, NodeContext context, ViewpointKey key) {\r
+ protected abstract class VPB extends LazyViewpoint implements Supplier<Boolean>, IChildrenCallback {\r
+ PrimitiveQueryUpdater updater;\r
+ \r
+ public VPB(PrimitiveQueryUpdater updater, NodeContext context, ViewpointKey key) {\r