/**
 * Returns a urxvt (rxvt-unicode) extension sequence (`OSC 777`).
 *
 * urxvt exposes Perl extensions through `OSC 777`, where the first parameter is
 * the extension name followed by its arguments, e.g.
 * `urxvtExtension("notify", "title", "body")`.
 *
 * Sequence: `OSC 777 ; extension ; param1 ; param2 ; … BEL`
 * @param extension The extension name to invoke.
 * @param parameters The extension parameters, joined with `;`.
 * @returns The `OSC 777` escape sequence.
 * @see {@link https://man.archlinux.org/man/urxvt.7}
 */
declare const urxvtExtension: (extension: string, ...parameters: string[]) => string;
export { urxvtExtension as default };