/**
 * `before` is `null` before anything was seen: a first render is never an arrival, or opening a
 * register flashes every row. A removal reports nothing.
 */
export declare function arrivalsSince(before: ReadonlySet<string> | null, ids: readonly string[]): string[];
/**
 * The ids new since the last render, for `TableRow`'s `justArrived`, so a realtime push is visible.
 * `scope` is what the list is of (filter, search, page): changing it reseeds silently, so a filter
 * change never flashes the page. An empty render never seeds either; `settled` says the read
 * landed, so the first row into an empty list is an arrival. One-shot: ids leave the set next
 * render.
 */
export declare function useJustArrived(ids: readonly string[], scope?: string, settled?: boolean): ReadonlySet<string>;