code: private Verification getVerification(VerificationType verificationType) throws RuleException {
          if (verificationType != null) {
              RowCountVerificationType rowCountVerificationType = verificationType.getRowCount();
              AggregationVerificationType aggregationVerificationType = verificationType.getAggregation();
              if (aggregationVerificationType != null) {
                  return AggregationVerification.builder().column(aggregationVerificationType.getColumn()).min(aggregationVerificationType.getMin())
                          .max(aggregationVerificationType.getMax()).build();
              } else if (rowCountVerificationType != null) {
                  return RowCountVerification.builder().min(rowCountVerificationType.getMin()).max(rowCountVerificationType.getMax()).build();
              } else {
                  throw new RuleException("Unsupported verification " + verificationType);
              }
          }
          return null;
      }
docs: Read the verification definition.