colspan Support like spanning table

I wanted to recreate table structure similar to this

I have tried customHeadRender and customBodyRender buts since i am able to customize individual cell but cannot group cells together i am not able to achieve the requirement.

please let me know if i am missing anything.

Thanks in Advance

Start by reviewing the customHeadRender and customBodyRender entry points to understand how individual cells are currently customized. Define how grouped header or body cells should express colspan behavior, then verify the expected table structure against the supplied screenshot and document or test the resulting API.

Written by the indexing model from the issue text.