import { QueryList } from '@angular/core';
import { ListKeyManager, CanDisable } from './list-key-manager';
/**
 * This is the interface for focusable items (used by the FocusKeyManager).
 * Each item must know how to focus itself and whether or not it is currently disabled.
 */
export interface Focusable extends CanDisable {
    focus(): void;
}
export declare class FocusKeyManager extends ListKeyManager<Focusable> {
    constructor(items: QueryList<Focusable>);
    /**
     * This method sets the active item to the item at the specified index.
     * It also adds focuses the newly active item.
     */
    setActiveItem(index: number): void;
}