import { ModelSerializer } from '@devexpress/analytics-core/analytics-utils';
import * as ko from 'knockout';
import { ComboBoxDashboardItemType } from '../../enums';
import { IDashboardSerializationInfo } from '../../metadata/_base-metadata';
import { FilterElementItemBase } from './filter-element-item-base';
export declare class ComboBoxItem extends FilterElementItemBase {
    comboBoxType: ko.Observable<ComboBoxDashboardItemType>;
    showAllValue: ko.Observable<boolean>;
    constructor(dashboardItemJSON?: any, serializer?: ModelSerializer);
    protected _getInfoCore(): IDashboardSerializationInfo[];
    protected _getDefaultItemType(): string;
    protected _allowAllValue(): boolean;
    protected _isMultiselectable(): boolean;
}