code: @Override
      public ApiResponse handleValidationError(ApiFailureResource resource) {
          final FaihyUnifiedFailureType failureType = FaihyUnifiedFailureType.VALIDATION_ERROR;
          final FaihyUnifiedFailureResult result = createFailureResult(failureType, resource, null);
          return asJson(result).httpStatus(prepareBusinessFailureStatus());
      }
docs: ----------------