code: func ParseTime(s string) (time.Time, error) {
  	t, err := time.Parse(logutil.SlowLogTimeFormat, s)
  	if err != nil {
  		// This is for compatibility.
  		t, err = time.Parse(logutil.OldSlowLogTimeFormat, s)
  		if err != nil {
  			err = errors.Errorf("string \"%v\" doesn't has a prefix that matches format \"%v\", err: %v", s, logutil.SlowLogTimeFormat, err)
  		}
  	}
  	return t, err
  }
docs: // ParseTime exports for testing.