Advanced Grid - Editable Boolean Column

Hi, I have a problem with configuration of Advanced Grid columns via JSON. My goal is to create one editable column, which should have boolean type, so it seems to be ok according to the doc. Now the JSON config: First part: var result = { "cellEditingEnable": true, "columns": { .... Second Part (under column def): "description": "....", "columnFormatter": { "type": "boolean", "format": "notext", "cellEditor": { "enabled": true, "type": "checkbox" } } I tried avery possible comination, format as checbox, notext, remove format, remove type and it is still not editable at all. Any ideas? Any example of valid config JSON with editable field? Thanks & Best Regards, Adam