gtkmm 3.22.1

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- NOTEBOOK_TAB_FIRST : Gtk
- NOTEBOOK_TAB_LAST : Gtk
- NOTHING : Gdk
- NUMBER_UP_LAYOUT_BOTTOM_TO_TOP_LEFT_TO_RIGHT : Gtk
- NUMBER_UP_LAYOUT_BOTTOM_TO_TOP_RIGHT_TO_LEFT : Gtk
- NUMBER_UP_LAYOUT_LEFT_TO_RIGHT_BOTTOM_TO_TOP : Gtk
- NUMBER_UP_LAYOUT_LEFT_TO_RIGHT_TOP_TO_BOTTOM : Gtk
- NUMBER_UP_LAYOUT_RIGHT_TO_LEFT_BOTTOM_TO_TOP : Gtk
- NUMBER_UP_LAYOUT_RIGHT_TO_LEFT_TOP_TO_BOTTOM : Gtk
- NUMBER_UP_LAYOUT_TOP_TO_BOTTOM_LEFT_TO_RIGHT : Gtk
- NUMBER_UP_LAYOUT_TOP_TO_BOTTOM_RIGHT_TO_LEFT : Gtk