import { AfterViewInit, ElementRef, Renderer2 } from "@angular/core";
export declare class BzSelectedOptionDirective implements AfterViewInit {
    private _elRef;
    private _rendere2;
    constructor(_elRef: ElementRef<any>, _rendere2: Renderer2);
    ngAfterViewInit(): void;
    /**
     * Set aria selected attribute.
     *
     * @author Federico Gambardella<fedega86@libero.it>
     * @return {void}
     */
    private _setAriaSelected;
}