code: func AccelGroupFromClosure(f interface{}) *AccelGroup {
  	closure, _ := glib.ClosureNew(f)
  	cl := (*C.struct__GClosure)(unsafe.Pointer(closure))
  	c := C.gtk_accel_group_from_accel_closure(cl)
  	if c == nil {
  		return nil
  	}
  	return wrapAccelGroup(glib.Take(unsafe.Pointer(c)))
  }
docs: // AccelGroupFromClosure is a wrapper around gtk_accel_group_from_accel_closure().