"MyProperty", "MyValue")
          .register(MyProvider.class)
          .enable(MyFeature.class);

    Response res = client.target("http://example.org/hello").request("text/plain").get();
    String message = res.readEntity(String.class);
 </pre>

<h1 id="provider-extensions-heading">Provider extensions</h1>

<p>JAX-RS applications may provide custom extensions to the client and server runtime using the
    common extension APIs defined in <a href="jakarta/ws/rs/ext/package-summary.html">jakarta.ws.rs.ext