export interface I18nLocalizer {
    /**
     * Return the localization string for the provided key
     * @param {string} key the key to get the localization for.
     * @param {any} default the default value if a localization
     * value for the provided key could not be found.
     * @returns a localization string for the provided key or
     * the default value if provided otherwise, it return the
     * key.
     */
    get(key: string, def?: any): string;
    /**
     * Return the localization string for the provided key
     * and replacing any placeholders in that string with
     * values from the replacements array.
     * @param {string} key the key to get the localization for.
     * @param {any[]|any} replacements an array of replacements for
     * any placeholders in the localizatioin text.
     * @param {string} default a default localization string to use if
     * a localization for the provided key could not be found.
     * @returns localization string for the provided key.
     *
     * @example
     * ```javascript
     *
     *  var localizer;
     *  var valueForSomeKey = 'this is my localization text {1}, {0}';
     *  localizer.format('somekey',['there','here']);
     *  //result will be
     *  //this is my localization text here, there
     *
     * ```
     */
    format(key: string, replacements?: any[] | any, def?: string): string;
    /**
     * Loads the localization dictionary.
     * @returns {Promise<any>} a promise that resolves a dictionary
     * containing the localization of the current language.
     */
    load(): Promise<any>;
    has(key: string): boolean;
    formatNumber(num: number): string;
    randomLoadingMessage(): string;
}