docs: @Nonnull
    public ApiFuture<WriteResult> update(
        @Nonnull Precondition options,
        @Nonnull String field,
        @Nullable Object value,
        Object... moreFieldsAndValues) {
      WriteBatch writeBatch = firestore.batch();
      return extractFirst(
          writeBatch.update(this, options, field, value, moreFieldsAndValues).commit());
    }