code: public File getDeletedFile(int index) {
      CheckUtilities.checkIntIndexInListRange(deletedFiles, index);
      return deletedFiles.get(index);
    }
docs: Returns the file at a given location in the deletedFiles list
  
  @param index
  in the list and should be positive and less than no. of files deleted.
  @return deleted file at the index in deleteFiles list.