Grid Panel Column header menu

I have CheckboxSelectionModel gridpanel, i need to stop hiding the column when i deselect from the header menu.





screenshots for reference:

Attachment 48422





Attachment 48423





i am able to deselect all the column from the columns menu.how can i restrict it to at least show one column as it happens if i dont use any selection model.

Attached Images

• Screenshot-2.png‎ (19.9 KB)


• Screenshot-1.png‎ (4.7 KB)