/**
 * @license
 * Copyright 厦门乾元盛世科技有限公司 All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file.
 */
export declare function isPresent(obj: any): boolean;
export declare function isDate(obj: any): boolean;
export declare function isNumeric(value: any): boolean;