SystemImage subset

Hello
Documentation says there are over 2000 images avalailable, but if you consult the link are almost 7300
“On Android, the image comes from a library of images built-in to the Xojo Android framework. There are over more than 2000 images available.”
Which is the subset you can use? If you substitute cat with dog in the example below button works, but no icon is visible
Thanks

Var shareIcon As Picture = Picture.SystemImage("cat")
Var shareItem As New MobileToolbarButton(MobileToolbarButton.Types.Plain, "Pets", shareIcon)
NavigationToolbar.AddButton(shareItem)

In the example section (new project → examples → platform → android → graphics) there is a project called SystemImageIcons
Inside there is a costant called kIconNames with the list of available icons
Hope this help noobs like me