gtk/gtk.go
func (v *Toolbar) GetDropIndex(x, y int) int {
	c := C.gtk_toolbar_get_drop_index(v.native(), C.gint(x), C.gint(y))
	return int(c)
}
func (v *Toolbar) GetDropIndex(x, y int) int {
	c := C.gtk_toolbar_get_drop_index(v.native(), C.gint(x), C.gint(y))
	return int(c)
}
// GetDropIndex is a wrapper around gtk_toolbar_get_drop_index().