Hi Ahan,
Unfortunately, the mentioned approach is the only way to define the Master-Detail Grid. To make the code look less bloated, you could define each nested Grid in a new component.
Please note that adding 10 nested Grid may affect the performance of the Grid. Take a look at our Performance Tips which can help you improve the Grid performance.
I hope this information helps. Let me know if I can further assist you.
Regards,
Hetali
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