code: def to_point(self, timestamp):
          
          return point.Point(value.ValueDouble(self.sum_data), timestamp)
docs: Get a Point conversion of this aggregation.
  
          :type timestamp: :class: `datetime.datetime`
          :param timestamp: The time to report the point as having been recorded.
  
          :rtype: :class: `opencensus.metrics.export.point.Point`
          :return: a :class: `opencensus.metrics.export.value.ValueDouble`-valued
          Point with value equal to `sum_data`.