nodehead

type NodeHead interface {
	SetHead(spaceId, head string) (part int, err error)
	GetHead(spaceId string) (head string, err error)
	SetOldHead(spaceId, head string) (part int, err error)
	GetOldHead(spaceId string) (head string, err error)
	DeleteHeads(spaceId string) error
	ReloadHeadFromStore(spaceId string) error
	LDiff(partId int) ldiff.Diff
	Ranges(ctx context.Context, part int, ranges []ldiff.Range, resBuf []ldiff.RangeResult) (results []ldiff.RangeResult, err error)
	app.ComponentRunnable
}