code: @Override
      public double validate(IMolecularFormula formula) throws CDKException {
          logger.info("Start validation of ", formula);
  
          List<Double> RDBEList = getRDBEValue(formula);
          for (Iterator<Double> it = RDBEList.iterator(); it.hasNext();) {
              double RDBE = it.next();
              if (min <= RDBE && RDBE <= 30) if (validate(formula, RDBE)) return 1.0;
          }
  
          return 0.0;
  
      }
docs: Validate the RDBRule of this IMolecularFormula.
  
  @param formula   Parameter is the IMolecularFormula
  @return          A double value meaning 1.0 True, 0.0 False