import { type XYChartState } from '../types/state.js';
import { type DotSeriesWithDatapoints, type RectDatapointInternal, type RectSeriesWithDatapoints } from '../types/xy-chart-internals.js';
import type { DotDatapoint } from '../types/xy-chart.js';
export declare function reduceDotTooltipContent(dot: DotDatapoint, series: DotSeriesWithDatapoints): (prev: XYChartState) => XYChartState;
export declare function reduceRectTooltipContent(rect: RectDatapointInternal, series: RectSeriesWithDatapoints): (prev: XYChartState) => XYChartState;
export declare function reduceUndefinedTooltipContent(prev: XYChartState): XYChartState;