Dynamic Loading in DataTable with JSArray

I am trying to parse datatable with JSArray data of length 2 with total_count 20, it does not add the empty rows below.

It works when data is passed in JSON format

Snippet - https://webix.com/snippet/d8b9b969
It contains 2 table with JSArray data and JSON data

Please let me know if I can achieve similar behaviour with JSArray formatted data

Thanks

add empty arrays to make total length equal 20
https://webix.com/snippet/99e3348c

Thanks @intregal for reply but this is not solving my problem.

I want to use this in with dynamic loading of data, if I push these extra rows manually, then callback onDataRequest would not get called.

https://webix.com/snippet/5993a4b8

@ankita_drpm try to implement custom DataDriver
https://webix.com/snippet/d3550ee5