import type { TimeSliderStartEndStepCurrent } from '../../map/map/types';
/**
 * Registers/unregisters a panel as a feature-sync source.
 */
export declare const useRegisterFeatureSyncSource: (panelId: string) => void;
/**
 * This registers a new syncgroup source for given panelId. The source is not synced to any group by default.
 * When the user links the source with a group, this hook returns an object with the timeslider state (start, end, step and current time) for the panel (if effectively linked).
 *
 * How it works:
 * - Registers/unregisters the source on mount/unmount.
 * - Returns `{ start, end, step, current }` when linked.
 * - Uses linked map selected time as `current` when available.
 * - Falls back to sync source "now" timestamp when
 *   synced state is not initialized yet.
 *
 * @param panelId panelId to register as sync source
 * @returns timeslider state
 */
export declare const useSyncgroupTimeState: (panelId: string, debounceMs?: number) => TimeSliderStartEndStepCurrent | undefined;