Datatables 1.10.19 Defer Loading with custom dataSrc

Hi, I'm trying to load data with Datatables 1.10.19 using defer loading feature with custom dataSrc, but I found that compat function (line 4105) is looking for "draw", "recordsTotal" and "recordsFiltered" in root data (json var), not in the root specified in dataSrc.
dataSrc is acting only as the location of object list (var data line 4109), not for the root of Datatables expected response parameters. Is this ok?
Is there another way to specify the location of "draw", "recordsTotal" and "recordsFiltered"?