import { NgZone } from '@angular/core';
import { Observable } from 'rxjs';
export declare enum Connection {
    UNKNOWN = "unknown",
    ETHERNET = "ethernet",
    WIFI = "wifi",
    CELL_2G = "2g",
    CELL_3G = "3g",
    CELL_4G = "4g",
    NONE = "none",
    CELL = "celluar"
}
export declare class NetworkInformationService {
    private zone;
    constructor(zone: NgZone);
    online(): Observable<any>;
    offline(): Observable<any>;
    connectionType(): Observable<Connection>;
}