private void propagateForward(@NotNull List<TraceElement> values) {
    if (myNextListener == null) return;
    final List<TraceElement> nextValues =
      values.stream().flatMap(x -> getNextValues(x).stream()).collect(Collectors.toList());
    myNextListener.highlightingChanged(nextValues, PropagationDirection.FORWARD);
  }
private void propagateForward(@NotNull List<TraceElement> values)