def reload(self):
        """Reload the metadata for this instance.

        See
        https://cloud.google.com/spanner/reference/rpc/google.spanner.admin.instance.v1#google.spanner.admin.instance.v1.InstanceAdmin.GetInstanceConfig

        :raises NotFound: if the instance does not exist
        """
        api = self._client.instance_admin_api
        metadata = _metadata_with_prefix(self.name)

        instance_pb = api.get_instance(self.name, metadata=metadata)

        self._update_from_pb(instance_pb)
Reload the metadata for this instance.

        See
        https://cloud.google.com/spanner/reference/rpc/google.spanner.admin.instance.v1#google.spanner.admin.instance.v1.InstanceAdmin.GetInstanceConfig

        :raises NotFound: if the instance does not exist