String (CompletableFuture<NodeRenderer> renderer, ValueDescriptor descriptor, EvaluationContext evaluationContext, DescriptorLabelListener listener) { return renderer.thenApply(r -> { try { return r.calcLabel(descriptor, evaluationContext, listener); } catch (EvaluateException e) { descriptor.setValueLabelFailed(e); listener.labelChanged(); return ""; } }).getNow(XDebuggerUIConstants.getCollectingDataMessage()); }