export declare function isArray(obj: unknown): obj is Array<any>;
export declare function isString(obj: unknown): obj is string;
export declare function isObject(obj: unknown): obj is Record<any, any>;
export declare function isNumber(obj: unknown): obj is number;
export declare function isBoolean(obj: unknown): obj is boolean;
export declare function isFunction(obj: unknown): obj is Function;
export declare function isObjectEmpty(obj: object): boolean;