How to Group Ext.List data on selectfield

[borryshasian]

I'm using usePicker:false on selectfield, but I didn't find a way to group the data on the overlay Ext.List.
Is it possible to do this?

[mitchellsimoens]

It is possible but not the easiest. You can specify the defaultTabletPickerConfig on the selectfield to change the list picker. I would create a new extension of select field to do this if it was me.