Who can give me this file---dhtmlxgrid_splt.js

hi,
I downloaded version 2.6 Standard Edition, why I can not find the file in this directory β€” htmlxGrid \ codebase \ ext \ dhtmlxgrid_splt.js,
Who can tell me what is the reason.
Thanks for your answer :cry:

This functionality is available in PRO version only.

Where can I download the Pro version

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