import type { HighlightedSeriesId } from '../components/interactions-state-helpers/types.js';
/**
 * This utility function returns opacity to apply to a canvas element based on highlighted series.
 * This is not intended for any other use than dimming canvas elements when a particular series is highlighted.
 * @param highlightedSeriesId - The IDs of highlighted series
 */
export declare const applyOpacityToCanvas: (highlightedSeriesId: HighlightedSeriesId) => string;