code: def GetExpirationTime(self):
      
      # TODO(emrekultursay): Move this to a common method.
      if '.' not in self.definition['createTime']:
        fmt = '%Y-%m-%dT%H:%M:%S%Z'
      else:
        fmt = '%Y-%m-%dT%H:%M:%S.%f%Z'
  
      create_datetime = datetime.strptime(
          self.definition['createTime'].replace('Z', 'UTC'), fmt)
      return create_datetime + self.expiration_period
docs: Computes the timestamp at which this breakpoint will expire.