Factory: return client with anonymous credentials.

        .. note::

           Such a client has only limited access to "public" buckets:
           listing their contents and downloading their blobs.

        :rtype: :class:`google.cloud.storage.client.Client`
        :returns: Instance w/ anonymous credentials and no project.

def create_anonymous_client(cls):
        """Factory: return client with anonymous credentials.

        .. note::

           Such a client has only limited access to "public" buckets:
           listing their contents and downloading their blobs.

        :rtype: :class:`google.cloud.storage.client.Client`
        :returns: Instance w/ anonymous credentials and no project.
        """
        client = cls(project="<none>", credentials=AnonymousCredentials())
        client.project = None
        return client