TypeError: 'undefined' is not an object (evaluating 'layoutDefinition.layoutConfigs')

[everhow@163.com]

1. I want to set a custom layout data for Ext.panel.Panel


2. I use the layout property, and select the object type


3. but it cann't work.


4. help help help.

for video demo.
http://v.youku.com/v_show/id_XNTA1MDAxODAw.html