One way to determine whether a cell in the grid had changed its value is to subscribe to the OnBatchEditCellValueChanged
event and raise a flag which value you can later check. Another option is to construct a method which to check for changes in the table view using the _extractChangesString method.
grid = $find(
batchManager = grid.get_batchEditingManager();
By following one of the above suggested approaches you should be able to verify whether the user has edited the data.
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