import { WidgetModel } from './widget';
export declare class DirectionalLinkModel extends WidgetModel {
    static serializers: any;
    defaults(): any;
    initialize(): void;
    updateValue(sourceModel: any, sourceAttr: any, targetModel: any, targetAttr: any): void;
    updateBindings(): void;
    cleanup(): void;
    sourceModel: WidgetModel;
    sourceAttr: string;
    targetModel: WidgetModel;
    targetAttr: string;
    private _updating;
}
export declare class LinkModel extends DirectionalLinkModel {
    defaults(): any;
    updateBindings(): void;
    cleanup(): void;
}
