code: @Activate
      protected void activate(Map<String, Object> properties) {
          if (properties == null)
              return;
          String uri = getURI(properties);
          if (uri == null)
              return;
          uri = normalize(uri);
          JAXRSClientConfigHolder.addConfig(this.toString(), uri, filterProps(properties));
      }
docs: /*---------
  @Reference(service = com.ibm.wsspi.classloading.ResourceProvider.class, target = "(resources=META-INF/services/javax.ws.rs.client.ClientBuilder)")
  protected void setResourceProvider(com.ibm.wsspi.classloading.ResourceProvider rp) {
  no-op
  }
  
  protected void unsetResourceProvider(com.ibm.wsspi.classloading.ResourceProvider rp) {
  no-op
  }
  
  @Reference
  protected void setJaxRsServiceActivator(JaxRsServiceActivator jrsa) {
  no-op
  }
  
  protected void unsetJaxRsServiceActivator(JaxRsServiceActivator jrsa) {
  no-op
  }
  ------------