/**
 * Replace items in string based on given object
 * Ex: formatMessage("Hello {World}!",{"World":"Joe"}) => Hello Joe!
 * @param  str String to be replaced
 * @param  params Object with items to replace
 * @returns  String with items replaced
 */
export declare function formatMessage(str: string, params: {
    [key: string]: unknown;
}): string;