code: public QueueTracer<?> getCurrentQueueTracer() {
      this.queueReadLock.lock();
      try {
        QueueTracer<?> tracer;
        if (this.queueConfig.enabled) {
  //        tracer = this.queueConfig.tracerMap.get(Thread.currentThread());
          tracer = this.queueConfig.currentTracer.get();
          if (tracer == null) {
            tracer = this.queueConfig.queueNullTracer;
          }
        }
        else {
          tracer = this.queueConfig.queueNullTracer;
        }
        
        return tracer;
      }
      finally {
        this.queueReadLock.unlock();
      }
    }
docs: Returns the QueueTracer for the current thread. If no one was found a QueueNullTracer will be returned.
  @return the QueueTracer for the current thread