/**
 * @license
 * Copyright Alibaba.com All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
 */
import { NzTreeNode } from './nz-tree-base-node';
export declare function isCheckDisabled(node: NzTreeNode): boolean;
export declare function isInArray(needle: any, haystack: any[]): boolean;