You could hide the tab by setting its Visibility
property but that tab will still be in the Items collection. You will see a space between the tabs because you've most probably set that property to hidden, but not to collapsed.
state means that the item is not shown but its bounds are still calculated in the layout logic. The Collapsed
state is similar to an advanced hidden state, i.e the item is not shown and its bounds are not taken into account.
If you need further assistance please feel free to write us.
All the best,
the Telerik team