gtk/popover_since_3_12.go
func PopoverNew(relative IWidget) (*Popover, error) {
	//Takes relative to widget
	var c *C.struct__GtkWidget
	if relative == nil {
		c = C.gtk_popover_new(nil)
	} else {
		c = C.gtk_popover_new(relative.toWidget())
	}
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapPopover(glib.Take(unsafe.Pointer(c))), nil
}
func PopoverNew(relative IWidget) (*Popover, error) {
	//Takes relative to widget
	var c *C.struct__GtkWidget
	if relative == nil {
		c = C.gtk_popover_new(nil)
	} else {
		c = C.gtk_popover_new(relative.toWidget())
	}
	if c == nil {
		return nil, nilPtrErr
	}
	return wrapPopover(glib.Take(unsafe.Pointer(c))), nil
}
//gtk_popover_new()