code: public JsonResponse<RESULT> switchMappingOption(Consumer<JsonMappingOption> opLambda) {
          assertArgumentNotNull("opLambda", opLambda);
          mappingOptionSwitcher = opLambda;
          return this;
      }
docs: (SIMPLE METHOD) Switch application's option to your mapping option. <br>
  JSON engine is new-created per response so use switchJsonEngine() for performance. <br>
  This is for e.g. SwaggerAction's json() that is not related to application rule.
  @param opLambda The callback for option settings of JSON mapping for another engine. (NotNull)
  @return this. (NotNull)