Issue transforming workbook to json

[el-greco14]

I'm trying to transform the workbook to a json using the below method:

import { transformWorkbookDataToSnapshotJson } from '@univerjs-pro/exchange-client';

const snapshotJson = transformWorkbookDataToSnapshotJson(workbookData);

however I'm only getting a small json with basic metadata, workbook structure, no. of sheets etc. I am not getting the full data of each sheet.

what type of object should I pass to this method? I am passing the workbook instance to it - which I'm getting via getActiveWorkbook()