code: public ValidationData save(ValidationData data) {
          if (data.getParamType() == null || data.getUrl() == null || data.getMethod() == null || data.getType() == null || data.getTypeClass() == null) {
              throw new ValidationLibException("mandatory field is null ", HttpStatus.BAD_REQUEST);
          }
  
          ValidationData existData = this.findById(data.getId());
  
          if (existData == null) {
              return this.addData(data);
          } else {
              existData.setValidationRules(data.getValidationRules());
              return existData;
          }
      }
docs: Save validation data.
  
  @param data the data
  @return the validation data