How to change top-level grid data when changing data in a nested grid.

[VladG1972]

I have 2 grids, one nested in another. How to change data in a first-level grid when changing data in a nested grid without re-reading the entire grid.

For example, in the upper grid there is a field the number of records in the nested grid and when deleting or changing records in the nested grid I need to correct their number