How to use checkbox selection in the Grid with enabled grouping

Environment

Product Version	5.9.0
Product	Progress® KendoReact Grid

Description

I want to use the checkbox selection in a Grid with enabled grouping.

Solution

When a group expression is applied to the Grid's data, the parent items in the data will be group items, so the logic for setting the select field value and the logic for determining the state of the "Select all" checkbox in the header must be different than the logic used without grouping.

Following is an example demonstrating this approach:

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