import type * as XLSX from 'xlsx';
import * as i0 from "@angular/core";
export declare class SheetjsHelperService {
    private xlsxLightweight;
    constructor(xlsxLightweight: boolean);
    getXlsx(): Promise<typeof XLSX>;
    static ɵfac: i0.ɵɵFactoryDeclaration<SheetjsHelperService, [{ optional: true; }]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SheetjsHelperService>;
}