export declare const isNull: (value: unknown) => value is null;
export declare const isBool: (value: unknown) => value is boolean;
export declare const isFunction: (value: unknown) => value is Function;
export declare const isUndefined: (value: unknown) => value is undefined;
export declare const isObject: (value: unknown) => value is object;
export declare const isAsync: (func: any) => boolean;
export declare const isPromiseLike: (value: any) => value is Promise<any>;