import { ElementRef, Renderer2 } from '@angular/core';
import * as i0 from "@angular/core";
export declare class LyHostClass {
    private _renderer;
    private readonly _set;
    private _nEl;
    constructor(_el: ElementRef, _renderer: Renderer2);
    add(className: string): void;
    remove(className?: string | null): void;
    toggle(className: string, enabled: boolean): void;
    update(newClassName: string, oldClassName: string | null | undefined): string;
    static ɵfac: i0.ɵɵFactoryDeclaration<LyHostClass, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<LyHostClass>;
}