[jQuery] nested sortable function

[jQuery] nested sortable function


i'm trying to use nested sortable plugin and find out 'insertOnTop:
function (e) {' line in sources. i'm not js geek, could you suggest me
how do i use this function? I just mean how to call it?
///
insertOnTop: function (e) {
        jQuery.iNestedSortable.updateCurrentNestingClass(e, e);
        jQuery.iNestedSortable.beforeHelperRemove(e);
        jQuery(e).prepend(jQuery.iSort.helper.get(0));
        jQuery.iNestedSortable.afterHelperInsert(e);
    },