code: public boolean isValid() {
          for (ValidationResult result : results) {
              for (ValidationMessage<Origin> message : result.getMessages()) {
                  if (Severity.ERROR.equals(message.getSeverity())) {
                      return false;
                  }
              }
          }
          return true;
      }
docs: Returns true if no errors have been reported.
  
  @return true if no errors have been reported