import type { WorkSlide, WorkSlideChart, WorkSlideChartDataLabels, WorkSlideChartType } from './work-types';
export interface PptxChartDataLabelDiagnostic {
    code: string;
    message: string;
}
export interface PptxChartDataLabelReadResult {
    dataLabels?: WorkSlideChartDataLabels;
    diagnostics: PptxChartDataLabelDiagnostic[];
}
export declare function readPptxChartDataLabels(chartNode: Element | undefined, chartType: WorkSlideChartType): PptxChartDataLabelReadResult;
export declare function patchPptxChartDataLabels(buffer: ArrayBuffer, slides: readonly WorkSlide[]): Promise<ArrayBuffer>;
export declare function writePptxChartDataLabels(document: Document, chartNode: Element, chart: WorkSlideChart): void;