/**
 * Best-effort ChartEx parser for Office 2016+ cx: chart XML.
 *
 * The parser captures the structured fields that ExcelTS can render and keeps
 * the original XML on the model so clean round-trips can still use raw bytes.
 */
import type { ChartExModel } from "./chart-ex-types.js";
export declare function parseChartEx(rawXml: string): ChartExModel;