Referencing JSON object for footer callback

Hi all,

I'm having a slight issue with referencing a different object from my JSON response.
The response looks like this ;

{
  "object1":
    {
      "ga:totals":"8",
      "ga:visits":"10"
    },
  "object2":
    [
      ["table row 1","Version 1",1,2,3,4,5],
      ["table row 2","Version 2",1,2,3,4,5]
    ]
}

If I use sAjaxDataProp to reference object2 this successfully draws the datatable with the rows specified, however I'm trying to draw a totals row in the tfoot section of the datatable which references object1 - ga:totals / ga:visits. It would be great if someone could point me in the right direction to reference object1 within the same call, to populate my tfoot with the object1 totals/visits.

All help is very much appreciated. Thanks in advance.