docs: private String getFixId(IFixInfo iFixInfo, ExtractedFileInformation xmlInfo) throws RepositoryArchiveInvalidEntryException {
  
          // check for null input
          if (null == iFixInfo) {
              throw new RepositoryArchiveInvalidEntryException("Null XML object provided", xmlInfo.getSourceArchive(), xmlInfo.getSelectedPathFromArchive());
          }
  
          // check the first child node is named fix
          return iFixInfo.getId();
      }