code: @Override
      public ApplicationTransportMessage createAPT() {
          ApplicationTransportMessageImpl apt = new ApplicationTransportMessageImpl(_APT_HOLDER.mandatoryCodes, _APT_HOLDER.mandatoryVariableCodes,
                  _APT_HOLDER.optionalCodes, _APT_HOLDER.mandatoryCodeToIndex, _APT_HOLDER.mandatoryVariableCodeToIndex,
                  _APT_HOLDER.optionalCodeToIndex);
  
          return apt;
      }
docs: /*
  (non-Javadoc)
  
  @see org.restcomm.protocols.ss7.isup.ISUPMessageFactory#createAPT()