feature request: expand/collapse on deepobject row "keys"

For instance, in the deepobjects example:
http://editor.datatables.net/release/DataTables/extras/Editor/examples/deepObjects.html
if the first column were absent (Browser) then you could collapse the table to just rows with unique Rendering Engine. Each row could have an expand arrow. When the user expands then the rows for it would appear. Could appear as-is in the current implementation or could appear offset by one row.