code: public void deltaTotalBlockingTime(long delta)
     {
        if (enabled.get() && delta > 0)
        {
           totalBlockingTime.addAndGet(delta);
           totalBlockingTimeInvocations.incrementAndGet();
  
           if (delta > maxWaitTime.get())
              maxWaitTime.set(delta);
        }
     }
docs: Add delta to total blocking timeout
  @param delta The value