URL map missing a host rule

[mountaincode2]

In the following URL map example:

https://cloud.google.com/load-balancing/docs/url-map-concepts#example-url-map-workflow

there is a following host rule:

```

hostRules:
- hosts:
  - '*'
  pathMatcher: video-matcher

```

But this host rule has not been created. Shouldn't there be another command as follows:

gcloud compute url-maps add-host-rule video-org-url-map \
    --hosts=* \
    --path-matcher-name=video-matcher

Please let me know.