db.go
func (seq *Sequence) Next() (uint64, error) {
	seq.Lock()
	defer seq.Unlock()
	if seq.next >= seq.leased {
		if err := seq.updateLease(); err != nil {
			return 0, err
		}
	}
	val := seq.next
	seq.next++
	return val, nil
}
func (seq *Sequence) Next() (uint64, error) {
	seq.Lock()
	defer seq.Unlock()
	if seq.next >= seq.leased {
		if err := seq.updateLease(); err != nil {
			return 0, err
		}
	}
	val := seq.next
	seq.next++
	return val, nil
}
func ( seq * Sequence ) Next ( ) ( uint64 , error ) { seq . Lock ( ) defer seq . Unlock ( ) if seq . next >= seq . leased { if err := seq . updateLease ( ) ; err != nil { return 0 , err } } val := seq . next seq . next ++ return val , nil }
// Next would return the next integer in the sequence, updating the lease by running a transaction
// if needed.
Next would return the next integer in the sequence updating the lease by running a transaction if needed .