/**
 * A single Excel cell value
 */
export type ExcelCell = string | number | null;
/**
 * Configuration for a single Excel sheet
 */
export interface SheetConfig {
    name: string;
    headers: string[];
    rows: ExcelCell[][];
}
/**
 * Generate and download an Excel file with multiple sheets.
 *
 * @param fileName - Name of the file without extension
 * @param sheets - Array of sheet configurations
 */
export declare function downloadExcel(fileName: string, sheets: SheetConfig[]): void;
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