if v {
		l.attrExternal.Set(l.extIndex(i))
	} else {
		l.attrExternal.Unset(l.extIndex(i))
	}
}

// AttrSpecial returns true for a symbols that do not have their
// address (i.e. Value) computed by the usual mechanism of
// data.go:dodata() & data.go:address().
func (l *Loader) AttrSpecial(i Sym) bool {
	return l.attrSpecial.Has(i)
}

// SetAttrSpecial sets the "special" property for a symbol (see

Extract the islands containing a TPU cluster computation into an outlined
function in a nested module. This will allow to run the usual bridge on this
nested module which now exhibits a more friendly "V2-like" structure.
This is only intended for V1 compatibility mode where the bridge runs without
feed/fetches on session create/extend.

So given e.g.