import { NgZone } from '@angular/core';
import { Breakpoint } from './breakpoint';
export declare class MediaSizeWatcher {
    private ngZone;
    private currentMediaSize;
    private subscribers;
    private mediaSizeQueryMap;
    constructor(ngZone: NgZone);
    getCurrentMedia(): Breakpoint;
    watch(subscriber: (MediaQueryList: any) => void): () => void;
    private listen;
    private alertSubscribers;
}