/**
 * @license
 * Copyright Datorama. All Rights Reserved.
 *
 * Use of this source code is governed by an Apache License 2.0 license that can be
 * found in the LICENSE file at https://github.com/datorama/client-core/blob/master/LICENSE
 */
import { MonoTypeOperatorFunction } from 'rxjs';
export declare enum KeyboardEventKeys {
    Escape = "Escape",
    Enter = "Enter",
    Tab = "Tab",
    ArrowDown = "ArrowDown",
    ArrowUp = "ArrowUp"
}
export declare const isArrowUpDown: (event: KeyboardEvent) => boolean;
export declare const isEnter: (event: KeyboardEvent) => boolean;
export declare const isEscape: (event: KeyboardEvent) => boolean;
export declare const filterKey: (key: KeyboardEventKeys) => MonoTypeOperatorFunction<KeyboardEvent>;