import { OverlayScrollbars } from 'overlayscrollbars';
import * as i0 from "@angular/core";
export declare abstract class AbstractScrollbarDirective {
    protected opened: boolean;
    protected panelActiveItemSelector: string;
    protected panelSelector: string;
    protected scroll: OverlayScrollbars;
    handleKeyboardEvent(event: KeyboardEvent): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<AbstractScrollbarDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<AbstractScrollbarDirective, never, never, {}, {}, never, never, true, never>;
}
