code: func SetClockSequence(seq int) {
  	if seq == -1 {
  		var b [2]byte
  		randomBits(b[:]) // clock sequence
  		seq = int(b[0])<<8 | int(b[1])
  	}
  	old_seq := clock_seq
  	clock_seq = uint16(seq&0x3fff) | 0x8000 // Set our variant
  	if old_seq != clock_seq {
  		lasttime = 0
  	}
  }
docs: // SetClockSeq sets the clock sequence to the lower 14 bits of seq.  Setting to
  // -1 causes a new sequence to be generated.