ListGrid with non-editable summary row

Be sure your post includes:

1. v8.1p_2013-05-14/PowerEdition Deployment (built 2013-05-14)

2. Firefox 21.0

Is there a way to create a ListGrid with editable fields but non-editable summary row for these fields using setShowGridSummary/setShowGroupSummary?

Thanks,

Cristian