code: def logline_timestamp_comparator(t1, t2):
      
      dt1 = _parse_logline_timestamp(t1)
      dt2 = _parse_logline_timestamp(t2)
      for u1, u2 in zip(dt1, dt2):
          if u1 < u2:
              return -1
          elif u1 > u2:
              return 1
      return 0
docs: Comparator for timestamps in logline format.
  
      Args:
          t1: Timestamp in logline format.
          t2: Timestamp in logline format.
  
      Returns:
          -1 if t1 < t2; 1 if t1 > t2; 0 if t1 == t2.