import { ElementRef } from '@angular/core';
import { Hydrateable } from './hydrated';
import { OnInit } from '@angular/core';
/**
 * A directive to add hydration capabilities to a container
 */
export declare class HydratorDirective implements OnInit {
    private element;
    hydratorMargin: string;
    hydratorTrace: boolean;
    private hydrateables;
    private observer;
    /** ctor */
    constructor(element: ElementRef);
    /** Register hydrateable component */
    registerHydrateable(hydrateable: Hydrateable): void;
    /** Unregister hydrateable component */
    unregisterHydrateable(hydrateable: Hydrateable): void;
    ngOnInit(): void;
    private callback;
}