This allows alternative menu switching to be implemented, besides the builtin GtkModelButton support.
0b4c376 GtkPopoverMenu: Add API to open a submenu
docs/reference/gtk/gtk3-sections.txt | 1 +
gtk/gtkpopovermenu.c | 42 +++++++++++++++++++++++++---------
gtk/gtkpopovermenu.h | 5 ++++
3 files changed, 37 insertions(+), 11 deletions(-)
Upstream: git.gnome.org