It worked for me with the AdvancedGridSampleFiles with GetEmployeeConfiguration and GetEmployeeData after adding
"cellEditingEnabled": true,
"editButtons": { "enabled": true,"location": "top-right", "enableAddDeleteButtons":true},
and then
"cellEditor": {"enabled": true } for each editable column (as documented here)
to the configuration.
Before binding the Configuration I bound EditCompleted and EditedTable to a service.