import { IGoogleMapsMarker } from '../../modules/marker/i-google-maps-marker';
import { IGoogleMapsPolygon } from '../../modules/polygon/i-google-maps-polygon';
import { IGoogleMapsPolyline } from '../../modules/polyline/i-google-maps-polyline';
import { IGoogleMapsData } from '../../modules/data/i-google-maps-data';
/**
 * Represents a snapshot of the map's overlays after changes happened.
 * @see OverlaysTracker.changes observable
 */
export declare class OverlaysState {
    /** `true` if this is the first change (tracker was just created); otherwise `false`. */
    readonly first: boolean;
    /** All current markers on the map. */
    readonly markers: IGoogleMapsMarker[];
    /** All current polygons on the map. */
    readonly polygons: IGoogleMapsPolygon[];
    /** All current polygons on the map. */
    readonly polylines: IGoogleMapsPolyline[];
    /** All current data layers on the map. */
    readonly dataLayers: IGoogleMapsData[];
    constructor(
    /** `true` if this is the first change (tracker was just created); otherwise `false`. */
    first: boolean, 
    /** All current markers on the map. */
    markers?: IGoogleMapsMarker[], 
    /** All current polygons on the map. */
    polygons?: IGoogleMapsPolygon[], 
    /** All current polygons on the map. */
    polylines?: IGoogleMapsPolyline[], 
    /** All current data layers on the map. */
    dataLayers?: IGoogleMapsData[]);
    /**
     * `true` if no overlays exist on the map; otherwise `false`.
     */
    get empty(): boolean;
}