import { IPieChartData } from '../../models/IPieChartData';
export declare class PieDataService {
    constructor();
    private data;
    setData(newData: IPieChartData[]): void;
    private dataSubject;
    $data: import("rxjs").Observable<IPieChartData[]>;
    updateData(newData: IPieChartData[]): void;
}