Dynamic collapsible in 1.42

Dynamic collapsible in 1.42

I have added a dynamic collapsible set via jquery load in my content division.  The data is loaded correctly and I can show the page with

$(':mobile-pagecontainer').pagecontainer('change', '#tablet_frame', {
transition: 'slide',
        changeHash: false,
        reverse: true,
        showLoadMsg: true
 });

where #tablet_frame is the id of the page.  Unfortunately the content is not enhanced and the set is not collapsed.

I have tried both (where  append_tab_data is the place the set was loaded):

$('#append_tab_data').enhanceWithin();
and
$('#append_tab_data').trigger('create");

and neither enhances the set.

Any thoughts on how this should work in 1.42?