code: public com.google.protobuf.ByteString
        getAdministrativeAreaBytes() {
      java.lang.Object ref = administrativeArea_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        administrativeArea_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
docs: <pre>
  Optional. Highest administrative subdivision which is used for postal
  addresses of a country or region.
  For example, this can be a state, a province, an oblast, or a prefecture.
  Specifically, for Spain this is the province and not the autonomous
  community (e.g. "Barcelona" and not "Catalonia").
  Many countries don't use an administrative area in postal addresses. E.g.
  in Switzerland this should be left unpopulated.
  </pre>
  
  <code>string administrative_area = 6;</code>