code: public com.google.privacy.dlp.v2.DatastoreKeyOrBuilder getDatastoreKeyOrBuilder() {
      if (typeCase_ == 2) {
        return (com.google.privacy.dlp.v2.DatastoreKey) type_;
      }
      return com.google.privacy.dlp.v2.DatastoreKey.getDefaultInstance();
    }
docs: <code>.google.privacy.dlp.v2.DatastoreKey datastore_key = 2;</code>