protected static ExecutorService createDefaultExecutor(Args options) {
    return (options.workerThreads > 0) ? Executors.newFixedThreadPool(options.workerThreads) : null;
  }
protected static ExecutorService createDefaultExecutor ( Args options ) { return ( options . workerThreads > 0 ) ? Executors . newFixedThreadPool ( options . workerThreads ) : null ; }
Helper to create the invoker if one is not specified