import { ModelSerializer } from '@devexpress/analytics-core/analytics-utils';
import * as ko from 'knockout';
import { DashboardItemFormatRule } from './dashboard-item-format-rule';
export declare abstract class ChartItemFormatRuleBase extends DashboardItemFormatRule {
    showInLegend: ko.Observable<boolean>;
    displayName: ko.Observable<string>;
    dataItemName: ko.Observable<string>;
    constructor(modelJson?: any, serializer?: ModelSerializer);
}