code: @Override
      public SIBUuid12 getConnectionUuid() {
          byte[] b = (byte[]) getApi().getField(JsApiAccess.CONNECTIONUUID_VALUE);
          if (b != null)
              return new SIBUuid12(b);
          return null;
      }
docs: /*
  Get the value of the ConnectionUuid field from the message header.
  
  Javadoc description supplied by JsMessage interface.