HRTime\StopWatch   extends HRTime\PerformanceCounter 
     {
   public float  getElapsedTime 
    ([  integer $unit 
  ] )
  public float  getLastElapsedTime 
    ([  integer $unit 
  ] )
   public int  HRTime\PerformanceCounter::getElapsedTicks 
    ( void
   )
  public int  HRTime\PerformanceCounter::getFrequency 
    ( void
   )
  public int  HRTime\PerformanceCounter::getLastElapsedTicks 
    ( void
   )
  public bool  HRTime\PerformanceCounter::isRunning 
    ( void
   )
  public void  HRTime\PerformanceCounter::start 
    ( void
   )
  public void  HRTime\PerformanceCounter::stop 
    ( void
   )
   }