export declare function isArray(thing: any): boolean;
export declare function isBoolean(thing: any): boolean;
export declare function isError(thing: any): boolean;
export declare function isElement(thing: any): boolean;
export declare function isFunction(thing: any): boolean;
export declare function isNumber(thing: any): boolean;
export declare function isObject(thing: any): boolean;
export declare function isString(thing: any): boolean;