export declare const isArray: (arg: any) => arg is any[];
export declare const isMap: (val: any) => boolean;
export declare const isSet: (val: any) => boolean;
export declare const isDate: (val: any) => val is Date;
export declare const isFunction: (val: any) => boolean;
export declare const isString: (val: any) => val is string;
export declare const isSymbol: (val: any) => val is symbol;
export declare const isObject: (val: any) => boolean;
export declare const isPromise: (val: any) => boolean;
export declare const isUrl: (url: string) => boolean;
export declare const isJSON: (str: string) => boolean;
export declare const JSONToObject: (str: string) => any;