docs: def Downsampled(cls, stats, interval=None):
      """Constructs a copy of given stats but downsampled to given interval.
  
      Args:
        stats: A `ClientStats` instance.
        interval: A downsampling interval.
  
      Returns:
        A downsampled `ClientStats` instance.
      """
      interval = interval or cls.DEFAULT_SAMPLING_INTERVAL
  
      result = cls(stats)
      result.cpu_samples = cls._Downsample(
          kind=CpuSample, samples=stats.cpu_samples, interval=interval)
      result.io_samples = cls._Downsample(
          kind=IOSample, samples=stats.io_samples, interval=interval)
      return result