# File lib/fog/container_infra/openstack/models/cluster_template.rb, line 45
        def update
          requires :uuid, :name, :keypair_id,  :flavor_id, :image_id,
                   :external_network_id, :coe
          attrs = convert_update_params(attributes)
          merge_attributes(service.update_cluster_template(uuid, attrs).body)
          self
        end