@Override
protected Gson initialValue() {
JsonInputGSONAdapter jsonInputAdapter = new JsonInputGSONAdapter(propertyView, config.getDefaultIdProperty());
ResultGSONAdapter resultGsonAdapter = new ResultGSONAdapter(propertyView, config.getDefaultIdProperty(), outputNestingDepth);
// create GSON serializer
final GsonBuilder gsonBuilder = new GsonBuilder()
.setPrettyPrinting()
.serializeNulls()