docs: public boolean isWithin(double delta)
      {
          readLock.lock();
          try
          {
              if (stats.count() >= stats.getInitialSize())
              {
                  return (Navis.angleDiff(stats.getMin(), stats.getMax()) < delta);
              }
              else
              {
                  return false;
              }
          }
          finally
          {
              readLock.unlock();
          }
      }