import type { MapFocus } from "./mapFocus";
/**
 * Stateful wrapper around `buildExpandedIds` that feeds the previous result
 * back as `previousIds`, producing hysteresis: markers that were expanded
 * stay expanded across incremental data updates (e.g. pan/zoom refetches).
 *
 * Memory rules:
 * - A marker no longer in `items` is naturally forgotten (not a candidate).
 * - When `focus.id` changes the memory is reset entirely.
 *
 * Callers replace a bare `useMemo(() => buildExpandedIds(...))` with this
 * hook — the signature is identical except `previousIds` is managed
 * internally.
 *
 * State is kept via the render-phase setState pattern (React docs §derived
 * state): calling setState during render causes React to discard the current
 * render and immediately re-render with the updated state, so callers never
 * observe a stale value. This avoids reading/writing a ref during render.
 */
export declare const useExpandedIds: <TAsset>(items: ReadonlyArray<TAsset>, getId: (item: TAsset) => string, focus: MapFocus<TAsset>, limit: number, getPosition?: (item: TAsset) => readonly [number, number, ...Array<number>]) => ReadonlySet<string>;