@Override
      public void startEvaluation(@NotNull XFullValueEvaluationCallback callback) {
        if (callback instanceof HeadlessValueEvaluationCallback) {
          XValueNodeImpl node = ((HeadlessValueEvaluationCallback)callback).getNode();
          node.clearFullValueEvaluator();
          setCalculated(((JavaValue)node.getValueContainer()).getDescriptor());
          node.getValueContainer().computePresentation(node, XValuePlace.TREE);
        }
        callback.evaluated("");
      }
@Override
      public void startEvaluation(@NotNull XFullValueEvaluationCallback callback)