import { BillItem } from './billItem';
import { Bill } from '../bill';
/**
 *
 *
 * @export
 * @abstract
 * @class BillCollection
 * @extends {Array<BillItem>}
 */
export declare abstract class BillCollection extends Array<BillItem> {
    /**
     *
     *
     * @type {Bill}
     */
    protected _bill: Bill;
    /**
     * Creates an instance of BillCollection.
     *
     * @param {Bill} bill
     */
    constructor(bill: Bill);
    readonly bill: Bill;
    /**
     *
     *
     * @param {BillItem} item
     * @returns {BillItem}
     */
    add(item: BillItem): BillItem;
    /**
     *
     *
     * @param {BillItem} item
     * @returns {boolean}
     */
    remove(item: BillItem): boolean;
    save(): boolean;
    toJson(useNomenclatureIds?: boolean): any;
}