import { IModelSerializer, ISerializationInfoArray } from '@devexpress/analytics-core/analytics-utils';
import * as ko from 'knockout';
import { IChartComponent } from '../../../common/utils/_chartUtils';
import { ChartElementCollectionItemBase } from '../../internal/_elementCollection';
export declare class TitleViewModel extends ChartElementCollectionItemBase implements IChartComponent {
    static prefix: string;
    static from(model: object, serializer?: IModelSerializer): TitleViewModel;
    constructor(model: object, parent: ko.ObservableArray<ChartElementCollectionItemBase>, serializer?: IModelSerializer);
    getExpressionProperties(): string[];
    getInfo(): ISerializationInfoArray;
    titleID: ko.Observable<string>;
    displayName: ko.Observable<string>;
    text: ko.Observable<string>;
}
export declare class ChartViewTitleModel extends TitleViewModel {
    getInfo(): ISerializationInfoArray;
}
export declare function assignTitleActions(titles: ko.ObservableArray<TitleViewModel>): void;
export declare const defaultChartTitleText = "Chart Title";
export declare const chartViewTitleSerializationsInfo: ISerializationInfoArray;
export declare const titleSerializationsInfo: ISerializationInfoArray;