code: public com.google.privacy.dlp.v2.DateTime.TimeZone getTimeZone() {
      return timeZone_ == null
          ? com.google.privacy.dlp.v2.DateTime.TimeZone.getDefaultInstance()
          : timeZone_;
    }
docs: <code>.google.privacy.dlp.v2.DateTime.TimeZone time_zone = 4;</code>