void adw_split_button_set_popover ( AdwSplitButton* self, GtkPopover* popover )
Sets the popover that will be popped up when the dropdown is clicked.
If the popover is
NULL, the dropdown is disabled.
AdwSplitButton:menu-model is set, the menu model is dissociated
from the button, and the property is set to
Available since: 1.0
The argument can be
The data is owned by the caller of the method.