I want to have checkboxes in group header as shown in the below example.

https://dojo.telerik.com/eKUzITAH/41

Once I click on the group header checkbox, the child group headers under the clicked group header and the data rows inside it should get checked and when it is unchecked all the datarows under the group header should get unchecked.

Individually if I check and uncheck a checkbox in the datarow,the parent group header should get checked if all the datarows are checked and should get unchecked if any of the data is unchecked under that group header.