Test for contents of ListBoxItem.
More items in the ComboBox to prove that they are not lazy-created (like the ListBox).
Disable virtualization on ListBox so that ListBoxItems are created also for non-visible items.
ComboBox items count.
Introduced IComboBoxItem interface to simplify extension methods signature and make core more reusable.
Removed misleading TODO comment.
Support for retrieving selected item on ComboBox.
ListBox selected item.
Support for IsSelected on ListBoxItem.
Better custom By. Allow client to create extension methods where a By expression is specified.
Use improved ByBuilder instead of By.Custom in all Find methods.
Pass expression into ByBuilder to make failure messages readable.