import { AxiosInstance } from 'axios';
import { ExtendData } from '../types';
/**
 * ReturnApi provides methods to handle article returns in the invoicing system.
 * This includes returning articles associated with an invoice.
 */
export { ExtendApi };
declare class ExtendApi {
    private client;
    constructor(client: AxiosInstance);
    extendInvoice(extendData: ExtendData): Promise<any>;
}
//# sourceMappingURL=extend.d.ts.map