Method EnsureParentExists

cpp/src/arrow/filesystem/s3fs.cc:3007–3012

  }

  Status EnsureParentExists(const S3Path& path) {
    if (path.has_parent()) {
      return EnsureDirectoryExists(path.parent());
    }
    return Status::OK();
  }

  static Result<std::vector<std::string>> ProcessListBuckets(
      const Aws::S3::Model::ListBucketsOutcome& outcome) {