code: public static ObjectMapper setupObjectMapper(ObjectMapper mapper) {
          final ApiModelMixinModule module = new ApiModelMixinModule();
          mapper.registerModule(module);
          mapper.enable(MapperFeature.ACCEPT_CASE_INSENSITIVE_ENUMS);
          return mapper;
      }
docs: Register the Rosette API Model Jackson module on an {@link ObjectMapper}.
  
  @param mapper the mapper.
  @return the same mapper, for convenience.