code: public static boolean isIpAddresKnown(final URI uri) {
          return uri != null && !(AMQP_SCHEME.equals(uri.getScheme()) || HIDDEN_IP.equals(uri.getHost()));
      }
docs: Check if the IP address of that {@link URI} is known, i.e. not an AQMP
  exchange in DMF case and not HIDDEN_IP in DDI case.
  
  @param uri
  the uri
  @return <code>true</code> if IP address is actually known by the server