[Vala] valadoc Question

[Steven Oliver <oliver steven gmail com>]

When I encounter pages like this one:
https://valadoc.org/gtk+-3.0/Gtk.Entry.set_icon_from_icon_name.html

How do I determine the list of icon names I can pick from? For
whatever reason valadoc doesn't list them. Is there somewhere else I
can look for the list?

I found that page by reviewing the example code for Gtk.Entry where
they make use of it:
https://valadoc.org/gtk+-3.0/Gtk.Entry.html

Steven N. Oliver