/**
 * ChartExporter - Handles chart export for Excel files
 *
 * This class processes chart data from Univer format and converts it
 * to ExcelJS-compatible chart objects for Excel export.
 */
export declare class ChartExporter {
    /**
     * Export charts from resources to ExcelJS worksheets
     */
    static exportCharts(workbook: any, worksheet: any, sheetId: string, resources: any[]): void;
    /**
     * Export a single chart to ExcelJS
     */
    private static exportSingleChart;
    /**
     * Map Univer chart type to ExcelJS chart type
     */
    private static mapChartType;
    /**
     * Extract data range from Univer range info
     */
    private static extractDataRange;
    /**
     * Create ExcelJS chart configuration
     */
    private static createChartConfig;
    /**
     * Convert column number to Excel column letter (0-based)
     */
    private static numberToColumnLetter;
    /**
     * Check if ExcelJS supports chart export
     */
    static isChartExportSupported(): boolean;
    /**
     * Get supported chart types
     */
    static getSupportedChartTypes(): string[];
    /**
     * Debug method to analyze chart data
     */
    static analyzeChartData(resources: any[]): any;
}