code: @Override
      public NetworkResourceManagementMessage createNRM() {
          NetworkResourceManagementMessage msg = new NetworkResourceManagementMessageImpl(_NRM_HOLDER.mandatoryCodes, _NRM_HOLDER.mandatoryVariableCodes,
                  _NRM_HOLDER.optionalCodes, _NRM_HOLDER.mandatoryCodeToIndex, _NRM_HOLDER.mandatoryVariableCodeToIndex,
                  _NRM_HOLDER.optionalCodeToIndex);
  
          return msg;
      }
docs: /*
  (non-Javadoc)
  
  @see org.restcomm.protocols.ss7.isup.ISUPMessageFactory#createNRM()