UniDBGrid Collapse Expand at runtime individually

[TAURO]

Hello,

I have a grouped uniDBGrid. (uniDBGrid.Grouping = Enabled)

I can Collapse or Expand all groups at runtime, but can't find a way to do it individually.
For example. I want the Grid to show me the groups collapsed to a record, and from there on the rest expanded and do it at runtime, by code.

Can someone help me to achieve this?

Thank you so much.

 

This is an image of the grid as an example:

https://drive.google.com/file/d/1O-D4ngD3RAW0yZ3203-Pi0P2MjjvEhYM/view?usp=sharing