code: public File getFileNeedingUpdate(int index) {
      CheckUtilities.checkIntIndexInListRange(filesNeedingUpdate, index);
      return filesNeedingUpdate.get(index);
    }
docs: Gets the file at the specified index from the list of files needing update.
  
  @param index
  The index of the file to get. It must fall in the range:
  <code>0 &lt;= index &lt; getRemovedFilesSize()</code>.
  @return The file at the specified index.