code: private CmsValidationResult validate(String validator, String value, String config) throws Exception {
  
          I_CmsValidationService validationService = getValidationService(validator);
          return validationService.validate(getCmsObject(), value, config);
      }
docs: Internal helper method for validating a single value.<p>
  
  @param validator the class name of the validation service
  @param value the value to validate
  @param config the configuration for the validation service
  
  @return the result of the validation
  
  @throws Exception if something goes wrong