docs: def new_histogram(name, reservoir=None):
      """
      Build a new histogram metric with a given reservoir object
      If the reservoir is not provided, a uniform reservoir with the default size is used
      """
  
      if reservoir is None:
          reservoir = histogram.UniformReservoir(histogram.DEFAULT_UNIFORM_RESERVOIR_SIZE)
  
      return new_metric(name, histogram.Histogram, reservoir)