import { Bill } from '../bill';
import { ValidationModel } from './validations';
import { IChargeAttributes } from '../charge/interface';
import { IModifierAttributes } from '../modifier/interface';
import { IPaymentAttributes } from '../payment/interface';
export declare type BillItemAttributes = IChargeAttributes | IModifierAttributes | IPaymentAttributes;
/**
 *
 *
 * @export
 * @abstract
 * @class BillItem
 */
export declare abstract class BillItem extends ValidationModel {
    state: any;
    /**
     *
     *
     * @type {Bill}
     */
    protected _bill: Bill;
    /**
     *
     *
     * @type {boolean}
     */
    isSaved: boolean;
    /**
     * Creates an instance of BillItem.
     *
     * @param {Bill} bill
     */
    constructor(bill: Bill);
    abstract update(attribute: BillItemAttributes): boolean;
    /**
     *
     *
     * @returns {Bill}
     *
     * @memberOf BillItem
     */
    readonly bill: Bill;
    /**
     *
     *
     * @returns {boolean}
     */
    save(): boolean;
    toJson(useNomenclatureIds?: boolean): any;
}