for i, fwd := range action {
		dst, err := buildDestination(ctx, fwd, ns, enforceRefGrant, k)
		if err != nil {
			if isInvalidBackend(err) {
				invalidBackendErr = err
				// keep going, we will gracefully drop invalid backends
			} else {
				return nil, nil, err
			}
		}
		res = append(res, &istio.RouteDestination{
			Destination: dst,
			Weight:      int32(weights[i]),
		})
	}