def conjunction_code

      case @type
      when IPP, STRAT, DENOM, NUMER, MSRPOPL
        HQMF::Precondition::ALL_TRUE
      when DENEXCEP, DENEX, MSRPOPLEX, NUMEX
        HQMF::Precondition::AT_LEAST_ONE_TRUE
      else
        raise "Unknown population type [#{@type}]"
      end

    end
def conjunction_code

      case @type
      when IPP, STRAT, DENOM, NUMER, MSRPOPL
        HQMF::Precondition::ALL_TRUE
      when DENEXCEP, DENEX, MSRPOPLEX, NUMEX
        HQMF::Precondition::AT_LEAST_ONE_TRUE
      else
        raise "Unknown population type [#{@type}]"
      end

    end
Get the conjunction code, e.g. allTrue, atLeastOneTrue
 @return [String] conjunction code