/**
 * Generate a user agent string like
 * ```
 * clickhouse-js/0.0.11 (lv:nodejs/19.0.4; os:linux)
 * ```
 * or
 * ```
 * MyApplicationName clickhouse-js/0.0.11 (lv:nodejs/19.0.4; os:linux)
 * ```
 */
export declare function getUserAgent(application_id?: string): string;