import { IModelSerializer } from '@devexpress/analytics-core/analytics-utils';
import * as ko from 'knockout';
import { ChartLocalizableElementCollectionItemBase } from '../../internal/_localizableElementCollection';
export declare class ConstantLineViewModel extends ChartLocalizableElementCollectionItemBase {
    static from(model: object, serializer?: IModelSerializer): ConstantLineViewModel;
    constructor(model: object, parent: ko.ObservableArray<ConstantLineViewModel>, serializer?: IModelSerializer);
    getExpressionProperties(): string[];
    static prefix: string;
    axisValue: ko.Observable<string>;
    _axisValue: ko.Observable<string>;
    legendText: ko.Observable<string>;
}