code: public void autostart(boolean enabled) {
      options.get(AUTOSTART).setValue(enabled);
  
      if (!enabled) {
        setPort(SERVER_DEFAULT_PORT_IDENTIFIER);
      }
    }
docs: Enable or disable whether Opera should be launched on initialization.  If disabled, {@link
  OperaDriver} will wait and listen for incoming an incoming Scope client connection.  This
  cannot be set during runtime.  This is true by default.
  
  @param enabled true if Opera should be started automatically, false otherwise