code: func AccelGroupNew() (*AccelGroup, error) {
  	c := C.gtk_accel_group_new()
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	obj := glib.Take(unsafe.Pointer(c))
  	return wrapAccelGroup(obj), nil
  }
docs: // AccelGroup is a wrapper around gtk_accel_group_new().