export declare function getDateTimeFormat(): {
    (locales?: string | string[] | undefined, options?: Intl.DateTimeFormatOptions | undefined): Intl.DateTimeFormat;
    new (locales?: string | string[] | undefined, options?: Intl.DateTimeFormatOptions | undefined): Intl.DateTimeFormat;
    supportedLocalesOf(locales: string | string[], options?: Intl.DateTimeFormatOptions | undefined): string[];
    readonly prototype: Intl.DateTimeFormat;
} | undefined;