<%- assert_locals service -%>
@configure ||= begin
  namespace = <%= service.namespace.split("::").reject(&:empty?).inspect %>
  parent_config = while namespace.any?
                    parent_name = namespace.join "::"
                    parent_const = const_get parent_name
                    break parent_const.configure if parent_const&.respond_to? :configure
                    namespace.pop
                  end
  default_config = <%= service.client_name %>::Configuration.new parent_config
  <%= render partial: "service/client/self_configure_defaults", locals: {service: service} %>
  default_config
end
yield @configure if block_given?
@configure