export declare const nativeUndefined: undefined;
export declare const objectKeys: {
    (o: object): string[];
    (o: {}): string[];
};
export declare const objectValues: {
    <T>(o: {
        [s: string]: T;
    } | ArrayLike<T>): T[];
    (o: {}): any[];
};
export declare const createObjectURL: (obj: Blob | MediaSource) => string;
export declare const revokeObjectURL: (url: string) => void;