How do i set requestedTheme in version 2.0.0-rc1+?

[SaverinOnRails]

In older versions, RequestedTheme(light or dark) could be set with the RequestedTheme attribute in FluentAvaloniaTheme. However, on version 2.0.0-rc1+, the attribute is no longer available. How can i set the requestedTheme? Also need to know how to set the theme in the visual studio previewer. Thanks

-----EDIT-----
Just read the updated docs and discovered i need to use the RequestedThemeVariant. Works great now