docs: public static HttpClientConnectionManager wrap
      (HttpClientConnectionManager orig) {
          if (orig instanceof Wrapped)
              throw new IllegalArgumentException();
          final Class<?>[] interfaces;
          if (orig instanceof ConnPoolControl) {
              interfaces = new Class<?>[]{
                      HttpClientConnectionManager.class,
                      ConnPoolControl.class,
                      Wrapped.class
              };
          } else {
              interfaces = new Class<?>[]{
                      HttpClientConnectionManager.class,
                      Wrapped.class
              };
          }
          return (HttpClientConnectionManager) Proxy.newProxyInstance(
                  // https://github.com/aws/aws-sdk-java/pull/48#issuecomment-29454423
                  ClientConnectionManagerFactory.class.getClassLoader(),
                  interfaces,
                  new Handler(orig));
      }