gtk:menu-button-popover (object)

object -- a gtk:menu-button widget
popover -- a gtk:popover widget, or nil to unset and disable the button

The accessor for the popover slot gets or sets the popover that pops out of the button. If the button is not using a popover, this function returns nil. Pass nil to dissociate any existing popover and disable the button.

If the menu-model property is set, the menu model is dissociated from the menu button, and the property is set to nil.