Copy records in Drag and Drop Grid ext-js 4.2.1

Hi,

I have been searching for solutions for this. I have two grid panels which have drag and drop plugin enabled.

I want the copy of the record which is dragged to destination grid to be inserted in , but when once record is dropped to other grid the record is lost in source grid.

I tried to find some solutions found this at many places.

Code:

Ext.create('Ext.grid.Panel', {
store: 'testStore',
columns: [
    {header: 'Name',  dataIndex: 'name', flex: true}
],
viewConfig: {
    copy: true,
    plugins: {
        ptype: 'gridviewdragdrop',
        dragText: 'Drag and drop to reorganize'
    }
},
height: 200,
width: 400,
renderTo: Ext.getBody()

I am using ext-js 4.2.1 and in document there is no copy config present

There is no config option as copy present.

Can anyone suggest how to achieve this functionality in ext-js 4.2.1.

Thanks & Regards

Rakesh

Copy records in Drag and Drop Grid ext-js 4.2.1