code: public com.google.protobuf.ByteString
        getDefaultHostnameBytes() {
      java.lang.Object ref = defaultHostname_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        defaultHostname_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
docs: <pre>
  Hostname used to reach this application, as resolved by App Engine.
  &#64;OutputOnly
  </pre>
  
  <code>string default_hostname = 11;</code>