Hello, I'm trying multi colum DBLookUpComboBox. Its code example on this link and my modified code is https://docs.sencha.com/extjs/6.2.0/classic/Ext.form.field.ComboBox.html col2 is my add colum. tpl example from here https://www.sencha.com/forum/showthread.php?7749-Adding-a-MultiColumn-ComboBox&s=94883ddfe5b974125a16f9381b4a44cf&p=49188&viewfull=1#post49188   var states = Ext.create('Ext.data.Store', { fields: ['abbr', 'name', 'col2'],