/// <reference types="google.maps" />
import { NgZone } from '@angular/core';
import { Observable } from 'rxjs';
import { ExgMapDataLayerComponent } from '../../exg-map-data-layer/exg-map-data-layer.component';
import { ExgMapGoogleAPIWrapper } from '../exg-map-google-api-wrapper.service';
/**
 * Manages all Data Layers for a Google Map instance.
 */
export declare class ExgMapDataLayerManagerService {
    private _wrapper;
    private _zone;
    private _layers;
    constructor(_wrapper: ExgMapGoogleAPIWrapper, _zone: NgZone);
    /**
     * Adds a new Data Layer to the map.
     */
    addDataLayer(layer: ExgMapDataLayerComponent): void;
    deleteDataLayer(layer: ExgMapDataLayerComponent): void;
    updateGeoJson(layer: ExgMapDataLayerComponent, geoJson: object | string): void;
    setDataOptions(layer: ExgMapDataLayerComponent, options: google.maps.Data.DataOptions): void;
    /**
     * Creates a Google Maps event listener for the given DataLayer as an Observable
     */
    createEventObservable<T>(eventName: string, layer: ExgMapDataLayerComponent): Observable<T>;
    /**
     * Extract features from a geoJson using google.maps Data Class
     * @param d : google.maps.Data class instance
     * @param geoJson : url or geojson object
     */
    getDataFeatures(d: google.maps.Data, geoJson: object | string): Promise<google.maps.Data.Feature[]>;
}
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