This is a plugin of jquery.dataTables to integrate jquery.treeTable v2.x. Not working with the latest jquery-treetable plugin
If you are still interested, I did create a live example here, hope this makes things clear.
To use this plugin, check out the first 2 points and make use of the APIs in point 3:
- Add the feature char 
'T'into"sDom"property in the initial settings of jquery.dataTables. - Specify initial settings for jquery.treeTable integrated, which is 
"oTreeTable"property in the initial settings of jquery.dataTables. For example: 
    $('#example').dataTable({
        "sDom": "Ttfr",
        "oTreeTable": {
            "fnPreInit": function(nRow, aData, iDisplayIndex, iDisplayIndexFull) {
            // This function will be registerd as "aoRowCallback" of jquery.dataTables,
            //  thus it has the same signature as "fnRowCallback".
            // Specify "id" & "class" attributes for each row (TR) required by jquery.treeTable:
            //   for parent rows, add class 'parent';
            //   for children rows, add a class with name of prefix - 'child-of-' and parent id
            },
            "showExpander": true,
            // The other settings to override the default options of jquery.treeTable, e.g. childPrefix, etc.
        },
        // The other settings of jquery.dataTables here...
    });- Few APIs (extending jquery.dataTables) are also added to handle treeTable specifically, those are:
isTreeTable()fnReloadAjaxTreeTable(sNewSource, fnCallback, bStandingDraw)