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