https://docs.gtk.org/gtk4/property.TreeListRow.expanded.html
Gtk.TreeListRow:expanded
Reference for property Gtk.TreeListRow:expanded
gtkexpanded
https://gnome.pages.gitlab.gnome.org/gtk/gtk4/property.TreeListRow.children.html
Gtk.TreeListRow:children
Reference for property Gtk.TreeListRow:children
gtkchildren