@NotNull
  private Collection<FilePath> gatherChangedPaths() {
    final Collection<FilePath> result = new ArrayList<>();

    UpdateFilesHelper.iterateFileGroupFiles(myAccumulatedFiles.getUpdatedFiles(),
                                            (filePath, groupId) -> result.add(VcsUtil.getFilePath(new File(filePath))));
    ContainerUtil.addIfNotNull(result, myMergeTarget);

    return result;
  }
@NotNull
  private Collection<FilePath> gatherChangedPaths()