@Nullable
  @Override
  default XFullValueEvaluator getFullValueEvaluator(EvaluationContextImpl evaluationContext,
                                                    ValueDescriptorImpl valueDescriptor) {
    if (isOnDemand(evaluationContext, valueDescriptor) && !isCalculated(valueDescriptor)) {
      return createFullValueEvaluator(getLinkText());
    }
    return null;
  }
@Nullable
  @Override
  default XFullValueEvaluator getFullValueEvaluator(EvaluationContextImpl evaluationContext,
                                                    ValueDescriptorImpl valueDescriptor)