In my outline view I return NO for a certain row from the delegate method [outlineView:shouldCollapseItem:], which is also set to be a 'group' item. This does prevent the group item being collapsed correctly, but it still shows that horrible 'show'/'hide' button - it's just that it no longer actually does anything. Is there a way to get rid of this button? I would have thought that if the row couldn't be collapsed the button should be automatically suppressed, but it's not.
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