code: def reload(self):
          
          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)
docs: 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