code: private ObjectMapper createObjectMapperWithRootUnWrap() {
          ObjectMapper mapper = new ObjectMapper();
          mapper.configure(DeserializationFeature.UNWRAP_ROOT_VALUE, true);
          mapper.addHandler(new CustomDeserializationProblemHandler());
         
          
          mapper.registerModule(new JodaModule());
          return mapper;
      }
docs: Creates the ObjectMapper that serializes json to entity. Wraps the root (most often "data").
  
  See @JsonRootName on the RestEntities
  
  @return