private void addFileToProcess(final int rootIndex,
                                  final String path,
                                  Collection<String> deletedFiles) {
      if (deletedFiles.contains(path)) {
        return;
      }
      Set<String> paths = filesToProcess.get(rootIndex);
      if (paths == null) {
        paths = CollectionFactory.createFilePathSet();
        filesToProcess.put(rootIndex, paths);
      }
      paths.add(path);
    }
private void addFileToProcess(final int rootIndex,
                                  final String path,
                                  Collection<String> deletedFiles)