"String valueField" : "item",
"xtype" : "ComboBox",
"String triggerAction" : "all",
+ "Boolean editable" : false,
"String fieldLabel" : "ComboBox",
"$ xns" : "Roo.bootstrap",
"String/Roo.Template tpl" : "<li class=\"select2-result\"><b>{item}</b></div>",