docs: static void apply(HttpCall.Factory callFactory, String name, String indexTemplate)
        throws IOException {
      HttpUrl templateUrl = callFactory.baseUrl.newBuilder("_template").addPathSegment(name).build();
      Request getTemplate = new Request.Builder().url(templateUrl).tag("get-template").build();
      try {
        callFactory.newCall(getTemplate, BodyConverters.NULL).execute();
      } catch (IllegalStateException e) { // TODO: handle 404 slightly more nicely
        Request updateTemplate =
            new Request.Builder()
                .url(templateUrl)
                .put(RequestBody.create(ElasticsearchStorage.APPLICATION_JSON, indexTemplate))
                .tag("update-template")
                .build();
        callFactory.newCall(updateTemplate, BodyConverters.NULL).execute();
      }
    }