import { AnnotationsTrackConfig } from '../types/annotations-track-props.js';
import { AnnotationsMarkerGroup } from '../types/annotations.js';
/**
 * Process annotation markers.
 * That includes sorting and grouping by time.
 *
 * @param trackProps - track props
 * @param trackIndex - track index
 * @param domain - visible domain
 * @returns processed markers
 */
export declare function processAnnotationTracksData(trackProps: AnnotationsTrackConfig, trackIndex: number, domain?: Date[] | number[]): Map<string, AnnotationsMarkerGroup[]>;