code: public static boolean staticSetRTS(String port, boolean flag)
              throws UnsupportedCommOperationException {
  
          logger.fine("RXTXPort:staticSetRTS( " + port
                  + " " + flag);
          return (nativeStaticSetRTS(port, flag));
      }
docs: Extension to CommAPI This is an extension to CommAPI. It may not be
  supported on all operating systems.
  
  Open the port and set RTS. remove lockfile and do not close This is so
  some software can appear to set the RTS before 'opening' the port a
  second time later on.
  
  @param port port name
  @param flag falg value
  @return none
  @throws UnsupportedCommOperationException on error