import { ElementRef, EventEmitter } from '@angular/core';
import * as i0 from "@angular/core";
export declare class ListGroupHeaderDirective {
    readonly elementRef: ElementRef;
    /** id of an element to be applied */
    nativeElementId: string | null;
    /** @hidden Implementation of KeyboardSupportItemInterface */
    keyDown: EventEmitter<KeyboardEvent>;
    /** @hidden */
    constructor(elementRef: ElementRef);
    /** @hidden */
    keydownHandler(event: KeyboardEvent): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<ListGroupHeaderDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<ListGroupHeaderDirective, "[fdListGroupHeader], [fd-list-group-header]", never, { "nativeElementId": { "alias": "nativeElementId"; "required": false; }; }, { "keyDown": "keyDown"; }, never, never, true, never>;
}
