class FileSystemIncrementalBackupLocation implements IncrementalBackupLocation {

  @Override
  public Map<String, File> getBackedUpOplogs(DiskStore diskStore) throws IOException {
    File checkedBaselineDir = checkBaseline(diskStore);
    if (checkedBaselineDir == null) {
      return Collections.emptyMap();
    }
    Collection<File> baselineOplogFiles = getBackedUpOplogs(checkedBaselineDir, diskStore);
    baselineOplogFiles.addAll(getPreviouslyBackedUpOpLogs(checkedBaselineDir));

    // Map of baseline oplog file name to oplog file
    return TransformUtils.transformAndMap(baselineOplogFiles, getFileNameTransformer());
  }

    FileSystemIncrementalBackupLocation(File backupLocationDir, String memberId);

}