NextObject       6570 src/heap.cc      if (filter_ == NULL) return NextObject();
NextObject       6572 src/heap.cc      HeapObject* obj = NextObject();
NextObject       6573 src/heap.cc      while (obj != NULL && filter_->SkipObject(obj)) obj = NextObject();
NextObject       2236 src/heap.h       HeapObject* NextObject();