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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _bucket_time(self, event_time):
 """ The seconds since epoch that represent a computed bucket. An event bucket is the time of the earliest possible event for that `bucket_width`. Example: if `bucket_width = timedelta(minutes=10)`, bucket times will be the number of seconds """

    event_time = kronos_time_to_epoch_time(event_time)
    return event_time - (event_time % self._bucket_width)