From TODO: ``` python # TODO: How do we handle NotFoundErrors? ``` See [`gcloud.storage.Key.set_contents_from_string`](https://github.com/GoogleCloudPlatform/gcloud-python/blob/1f2aaf3606802f4f02eeb30e22e1082ef7f4594e/gcloud/storage/key.py#L282) for relevant code and #146 for some context.