How can I set column property of gridpanel to accept dynamic variable using Architect? I have a working extjs code (non-Architect) that defines column property like this:

var grid = Ext.create('Ext.grid.Panel', {
columns: {
items: gridColumns

where gridColumns is some variable I create when i get json from the server.

I need to recreate this code into Architect, but column property seems to always require at least one field to be present. Is there a way to set column property in Architect same way as I set it in non-Architect code?

Thank you.