temporal

type Diff []byte

type Map interface {
	ToBytes() []byte
	GetTimeRange() (time.Time, time.Time)
	Add(timestamp time.Time, key string, value []byte)
	GetItem(timestamp time.Time, key string) []byte
	Update(timestamp time.Time, key string, value []byte)
	Remove(timestamp time.Time, key string)
	GetStateAtTime(timestamp time.Time) map[string][]byte
	FindNextTimeKey(timestamp time.Time, dir int, key string) (time.Time, error)
}

type TimeValueStore struct {
	Keyframes []keyFrame
}