storage/remote/write.go
func (t *timestampTracker) Add(_ labels.Labels, ts int64, v float64) (uint64, error) {
	t.samples++
	if ts > t.highestTimestamp {
		t.highestTimestamp = ts
	}
	return 0, nil
}
func (t *timestampTracker) Add(_ labels.Labels, ts int64, v float64) (uint64, error) {
	t.samples++
	if ts > t.highestTimestamp {
		t.highestTimestamp = ts
	}
	return 0, nil
}
func ( t * timestampTracker ) Add ( _ labels . Labels , ts int64 , v float64 ) ( uint64 , error ) { t . samples ++ if ts > t . highestTimestamp { t . highestTimestamp = ts } return 0 , nil }
// Add implements storage.Appender.
Add implements storage . Appender .