import { JsonCompiler } from '@biesbjerg/ng2-translate-extract/dist/compilers/json.compiler';
import { TranslationCollection } from '@biesbjerg/ng2-translate-extract/dist/utils/translation.collection';
export declare class Utils {
    compiler: JsonCompiler;
    toJsonMap(jsonFolder: string): Map<string, TranslationCollection>;
    jsonMapToExcel(translationsPerLanguageMap: Map<string, TranslationCollection>, splitKeys: boolean): any;
    private createWorkSheetWithColumns(wb, languages, splitKeys);
    private styleHeader(ws);
    writeExcelToFile(wb: any, file: string): void;
}