code: public static void startThreads(String title){
      if(isThreaded){
        throw new IllegalStateException("Cannot nest Redwood threaded environments");
      }
      startTrack(FORCE,"Threads( "+title+" )");
      isThreaded = true;
    }
docs: Start a multithreaded logging environment. Log messages will be real time
  from one of the threads; as each thread finishes, another thread begins logging,
  first by making up the backlog, and then by printing any new log messages.
  A thread signals that it has finished logging with the finishThread() function;
  the multithreaded environment is ended with the endThreads() function
  @param title The name of the thread group being started