code: public byte getGuaranteedProtocolVersion() {
          Byte value = (Byte) getHdr2().getField(JsHdr2Access.GUARANTEED_SET_PROTOCOLVERSION);
          return (value == null) ? 0 : value.byteValue();
      }
docs: /*
  Get the version of the guaranteed delivery protocol used by this message.
  
  Javadoc description supplied by CommonMessageHeaders interface.