code: private static String getExistingMatchingIfixID(BundleFile bundleFile, Set<String> existingIDs, Map<String, BundleFile> bundleFiles) {
          String existingIfixKey = null;
          // Iterate over the known ids.
          for (String existingID : existingIDs) {
              // If we have a corresponding BundleFile for the existing ID, we need to check it matches the currently processed file.
              if (bundleFiles.containsKey(existingID)) {
                  BundleFile existingBundleFile = bundleFiles.get(existingID);
                  // If our symbolic name match the supplied BundleFile then move on to the version checking.
                  if (bundleFile.getSymbolicName().equals(existingBundleFile.getSymbolicName())) {
                      //Get the versions of both the checking bundle and the existing bundle. Check that the version, excluding the qualifier match
                      // and if they do, we have a match.
                      Version existingBundleVersion = new Version(existingBundleFile.getVersion());
                      Version bundleVersion = new Version(bundleFile.getVersion());
                      if (bundleVersion.getMajor() == existingBundleVersion.getMajor() &&
                          bundleVersion.getMinor() == existingBundleVersion.getMinor() &&
                          bundleVersion.getMicro() == existingBundleVersion.getMicro())
                          existingIfixKey = existingID;
                  }
              }
          }
          return existingIfixKey;
      }
docs: This method takes a ifix ID finds any existing IFix IDs that refer to the same base bundle. Because the ifix jars will have
  different qualifiers, we need to be able to work out which ids are related.
  
  @param bundleFile - The bundleFile that maps to the current jar file we're processing.
  @param existingIDs - A Set of Strings that represent the existing updateIds.
  @param bundleFiles - All the known bundleFile objects.
  @return - The existing key that maps to the same base bundle.