docs: @Traced
      public String call() {
          // tag::client-registration[]
          Client client = ClientTracingRegistrar.configure(ClientBuilder.newBuilder()).build();
          // end::client-registration[]
          try {
              String response = client.target("http://localhost:8080")
                      .path("/simple")
                      .request()
                      .get(String.class);
              return "Called an external service successfully, it responded: " + response;
          } finally {
              client.close();
          }
      }