import ListFormat = Intl.ListFormat;
/**
 * @private
 */
export declare class LocaleCache {
    protected static _intlDTCache: Map<string, Intl.DateTimeFormat>;
    protected static _intlLFCache: Map<string, Intl.ListFormat>;
    protected static _intlNumCache: Map<string, Intl.NumberFormat>;
    protected static _intlRelCache: Map<string, Intl.RelativeTimeFormat>;
    protected static _intlResolvedOptionsCache: Map<string, any>;
    protected static _sysLocaleCache: string | void;
    static getCachedDTF(locString: string, options?: Intl.DateTimeFormatOptions): Intl.DateTimeFormat;
    static getCachedINF(locString: string, options: Intl.NumberFormatOptions): Intl.NumberFormat;
    static getCachedIntResolvedOptions(locString: string): Intl.ResolvedDateTimeFormatOptions;
    static getCachedLF(locString: string, opts?: Intl.ListFormatOptions): ListFormat;
    static getCachedRTF(locale: Intl.UnicodeBCP47LocaleIdentifier, options?: Intl.RelativeTimeFormatOptions): Intl.RelativeTimeFormat;
    static reset(): void;
    static systemLocale(): string;
}