import { type RectDatapointInternal, type SeriesVariantType, type XYChartSeriesWithDatapoints } from '../types/xy-chart-internals.js';
import type { AreaDatapoint, BarDatapoint, DotDatapoint, LineDatapoint } from '../types/xy-chart.js';
export type IsValidDatapoint = (type: SeriesVariantType, datapoint: RectDatapointInternal | DotDatapoint | LineDatapoint | BarDatapoint | AreaDatapoint) => boolean;
export declare function formatCSV(data: XYChartSeriesWithDatapoints[], isValidDatapoint: IsValidDatapoint, getSeriesName: (series: XYChartSeriesWithDatapoints) => string): string;