Copy record using drag/drop

[Pierre]

Hello all
Is there option to copy record(s) from treeGrid-A to treeGrid-B using drag/drop?
Have found solution (on this forum) for tree:

Code:

	onBeforeDrop: function(target,source,point){
		if( source.attributes.source == 'person_tree' ){
			toAppend = $.extend(true,{},source);
			toAppend.attributes.source = 'big_tree';
			$(this).tree('append', {
				parent: target,
				data: toAppend,
			});
			return false;
		}
	}

With other words, it should work same as existing drag/drop except source record(s) should not be deleted.
Thank you.

[Pierre]

Anyone, please?