This is preview!
No idea, given that it's undocumented, both in the documentation and in the code itself. There are no comments in the code indicating how the parameter is used. One would have to look through the code further, and see how and where it is called with the parameter given.So instead of calling .listview('create') you can call .listview('refresh', true);? That just seems strange... Maybe I am misunderstanding the use of the second parameter.