Gtk4 expander: CSS nodes mismatch code vs. documentation
The documentation of GtkExpander (see here) defines the following CSS nodes:
expander
╰── box
├── title
│ ├── arrow
│ ╰── <label widget>
╰── <child>
but since commit 6d20fe0b it seems to have changed as follow:
expander-widget
╰── box
├── title
│ ├── expander
│ ╰── <label widget>
╰── <child>
expander-widget
sounds weird... do you confirm it's expected?