import { AnnotationsTrackConfig } from '../types/annotations-track-props.js';
/**
 *
 * @param tracks -
 * @param domain -
 * @returns
 */
export declare const useGroupedAnnotationsData: (tracks: AnnotationsTrackConfig[], domain?: Date[] | number[]) => {
    markers: Map<string, import("../types/annotations.js").AnnotationsMarkerGroup[]>;
    label: string | undefined;
    hidden: boolean;
}[];