[OPEN] Grid reconfigure not working

Open a locked grid sample.

Code:

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Ext.ComponentQuery.query('gridpanel[lockable=true]')[0].reconfigure(new Ext.data.Store(), [{dataIndex : name, locked : true }, { dataIndex : 'name' }])

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Notice that the grid isn't using the new store in the locked grid, still showing as many rows as before the reconfigure.