import { Modifier } from './index';
import { BillCollection } from '../concerns/billCollection';
import { IModifierAttributes } from './interface';
/**
 *
 *
 * @export
 * @class ModifiersCollection
 * @extends {BillCollection}
 */
export declare class ModifiersCollection extends BillCollection {
    /**
     *
     *
     * @param {IModifierAttributes} [attributes={}]
     * @returns {Modifier}
     */
    new(attributes?: IModifierAttributes): Modifier;
    /**
     *
     *
     * @returns {number}
     */
    sum(): number;
    add(modifier: Modifier): Modifier;
}