/**
 * 生成唯一名称
 * 第二个名称加后缀从 2 开始
 */
export declare const uniqueName: (name: string) => string;
/**
 * 生成唯一 ID
 */
export declare const getUniqueId: (prefix?: string) => string;
/**
 * lodash mergeWith 自定义方法
 */
export declare const mergeWithCustomizer: (objValue: any, srcValue: any) => any[] | undefined;
/**
 * 判断是否是 URL
 */
export declare const isValidUrl: (urlString: string) => boolean;
/**
 * 推断不是 null or undefined
 */
export declare const notNullorUndefined: <T extends unknown>(d: T | null | undefined) => d is T;