import { type IResolvedReferenceValues, type ITooltipLocalizedStrings } from "./types.js";
/**
 * Merge order matters: in-chart values override external ones, because the
 * in-chart value is what the user already sees on the rendered point/feature.
 * If a tooltip references the same id from both, showing the external (fetched)
 * value would let it drift from what the chart pixel displays.
 *
 * @internal
 */
export declare function composeCustomTooltipSectionHtml(content: string, inChartValues: IResolvedReferenceValues, externalValues: IResolvedReferenceValues, localizedStrings: ITooltipLocalizedStrings): string;
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