code: public IdentificationResponseMessage createIRS() {
          IdentificationResponseMessage msg = new IdentificationResponseMessageImpl(_IRS_HOLDER.mandatoryCodes,
                  _IRS_HOLDER.mandatoryVariableCodes, _IRS_HOLDER.optionalCodes, _IRS_HOLDER.mandatoryCodeToIndex,
                  _IRS_HOLDER.mandatoryVariableCodeToIndex, _IRS_HOLDER.optionalCodeToIndex);
          return msg;
      }
docs: /*
  (non-Javadoc)
  
  @see org.restcomm.protocols.ss7.isup.ISUPMessageFactory#createIRS(int cic)