See db.Database.

def ReadAllClientGraphSeries(
      self,
      client_label,
      report_type,
      time_range = None,
  ):
    """See db.Database."""
    series_with_timestamps = {}
    for series_key, series in iteritems(self.client_graph_series):
      series_label, series_type, timestamp = series_key
      if series_label == client_label and series_type == report_type:
        if time_range is not None and not time_range.Includes(timestamp):
          continue
        series_with_timestamps[timestamp.Copy()] = series.Copy()
    return series_with_timestamps