Sets the #GtkPopover that will be popped up when the button is clicked, or %NULL to disable the button. If #GtkMenuButton:menu-model or #GtkMenuButton:popup are set, they will be set to %NULL.
a #GtkPopover
3.12
See Implementation
Sets the #GtkPopover that will be popped up when the button is clicked, or %NULL to disable the button. If #GtkMenuButton:menu-model or #GtkMenuButton:popup are set, they will be set to %NULL.