def __init__(self, date_range):
    StatCollection.__init__(self, "Sender to me distribution for ")

    for year in GetYearRange(date_range):
      self._AddStatRef(MeSenderDistribution(year), "%s" % year)
dataset/ETHPy150Open mihaip/mail-trends/stats/group.py/MeSenderDistributionStatCollection.__init__/original