import { MutableRefObject, ReactNode } from 'react';
type EvolutionChartHoverOverlayProps = {
    hoveredDatasetIndex: number | null;
    labels: string[];
    barCentersRef: MutableRefObject<Record<string, number>>;
    barHalfWidthRef: MutableRefObject<Record<string, number>>;
    barTopsRef: MutableRefObject<Record<string, Record<number, number>>>;
    barBottomsRef: MutableRefObject<Record<string, Record<number, number>>>;
    colors: string[];
    areaGap: number;
    barWidth: number;
};
/**
 * Creates smooth curved areas that highlight a dataset when you hover over it.
 * Think of it like drawing connecting bridges between all the bars of the same color
 * to show they belong together - like connecting the dots but with pretty curves!
 */
export declare const EvolutionChartHoverOverlay: (props: EvolutionChartHoverOverlayProps) => ReactNode;
export {};