import { TRechartsSeries } from '../toLine';
export type TStackedAreaPoint = {
    timestamp: number;
    [seriesId: string]: number;
};
/**
 * Builds stacked-area-compatible data from TRechartsSeries[].
 * Shape:
 * [
 *   { timestamp: 1000, c1: 1, p2: 3 },
 *   { timestamp: 2000, c1: 2 },
 * ]
 */
export declare const matrixToStackedAreaData: (series: TRechartsSeries[] | undefined) => TStackedAreaPoint[];
