serializeToCSV only Exports Expanded Rows

When i call serializeToCSV on my TreeGrid it will only export the currently expanded rows. If I expand a row so that it renders, close it and then try serializeToCSV it still won’t grab those collapsed rows. Is there a way to make it export all the rows?

CSV serialization is purposed for plain grids only.
dhtmlx.com/docs/products/kb/inde … 20treegrid