Is there a way to hide a viewcell in a listview?

I'm trying to dynamically show and hide viewcells or their contents inside of a listview (and similarly inside of a scrollview). In both cases, setting IsVisible=false on the contents the items are no longer visible but the UI does not redraw to close up the now empty space.

<ViewCell>
    <StackLayout IsVisible="false"...

Is this possible, or alternately, can you show/hide the contents and cause the display to redraw?

I can of course add and remove items from the listview and maybe that is the correct way to implement this?