@Override
    public void addStack(@NotNull ObjectReference ref, @NotNull List<StackFrameItem> frames) {
      myType2Reference2Stack.computeIfAbsent(ref.referenceType(), referenceType -> new ConcurrentHashMap<>()).put(ref, frames);
    }
@Override
    public void addStack(@NotNull ObjectReference ref, @NotNull List<StackFrameItem> frames)