export declare class UnitDisplay {
    private symbol;
    private position;
    constructor(options: {
        locale: string;
        unit: string;
        unitDisplay: 'long' | 'short' | 'narrow';
    });
    constructor(options: {
        locale: string;
        currency: string;
        currencyDisplay: 'code' | 'symbol';
    });
    get prefix(): string | null;
    get suffix(): string | null;
}