export declare function oneOf(value: any, validList: any): boolean;
export declare function typeOf(obj: any): any;
/**
 * 判断任意类型的值是否为undefined或者null
 */
export declare function isNotUndefined(value: any): boolean;
export declare function isUndefined(value: any): boolean;
export declare const isDefined: (val: any) => boolean;