export declare class FormatService {
    formatNumber(value: number, locale: string, options?: Intl.NumberFormatOptions): string;
    formatDate(value: Date | number | string, locale: string, options?: Intl.DateTimeFormatOptions): string;
    formatRelativeTime(value: Date | number | string, locale: string, options?: Intl.RelativeTimeFormatOptions): string;
}