import { ElementRef, OnInit, OnDestroy, Renderer2, EventEmitter } from '@angular/core';
import { RenderInterceptor } from '@angular-contrib/core';
export declare class ObserveContentInterceptor implements RenderInterceptor {
    appendChild(parent: Node, newChild: Node, renderer: Renderer2): void;
    insertBefore(parent: Node, newChild: Node, refChild: Node, renderer: Renderer2): void;
    removeChild(parent: Node, oldChild: Node, isHostElement: boolean | undefined, renderer: Renderer2): void;
}
export declare class NgObserve implements OnInit, OnDestroy {
    private host;
    private renderer;
    contentChange: EventEmitter<any>;
    content: Node[];
    constructor(host: ElementRef, renderer: Renderer2);
    ngOnInit(): void;
    ngOnDestroy(): void;
    updateContent(): void;
}
export declare class NgObserveStart implements OnInit, OnDestroy {
    private host;
    private renderer;
    contentChange: EventEmitter<any>;
    content: Node[];
    parent: Node;
    constructor(host: ElementRef, renderer: Renderer2);
    ngOnInit(): void;
    ngOnDestroy(): void;
    updateContent(): void;
}
export declare class NgObserveEnd {
    constructor(host: ElementRef, renderer: Renderer2);
}