/**
 * Fetches league names from the provided URL.
 *
 * This function fetches data from the specified URL which contains information about
 * Path of Exile leagues. It then extracts the names of the leagues from the fetched data
 * and returns them as an array.
 *
 * @returns A Promise that resolves with an array of league names.
 * @throws  If an error occurs during the fetch process or if the response data is empty.
 */
declare function getLeagues(): Promise<string[]>;
export default getLeagues;