for (const auto& target_fields : target_fields_list) {
      TF_ASSIGN_OR_RETURN(
          int matches,
          fieldTagMatches(chunked_field.field_tag(), target_fields));
      if (matches == chunked_field.field_tag_size()) {
        // chunked_field_tags is an initial subsequence of target_fields, which
        // means the chunked_field is relevant and the necessary data should be
        // copied over.