import { OnDestroy } from '@angular/core';
import { NotifierRef } from '../notifier-ref';
import { Strategy } from './strategy';
export declare abstract class AbstractStrategy implements Strategy, OnDestroy {
    private _document;
    notifiers: NotifierRef[];
    margin: number;
    maxNotifiers: number;
    constructor(_document: HTMLDocument);
    newNotifier(notifierRef: NotifierRef): void;
    protected abstract getStyleNewNotifier(notifierRef: NotifierRef): any;
    protected abstract getStyleNotifierPosition(divNotifier: HTMLDivElement, clientHeight: number): any;
    private deletePortal;
    protected abstract getStyleDeleteNotifier(elementChange: HTMLDivElement, clientHeightElementDelete: number): any;
    ngOnDestroy(): void;
}