@NotNull
  public MergeRootInfo getMergeRootInfo(final File file, final SvnVcs svnVcs) {
    if (!myMergeRootInfos.containsKey(file)) {
      myMergeRootInfos.put(file, new MergeRootInfo(file, svnVcs));
    }
    return myMergeRootInfos.get(file);
  }
@NotNull
  public MergeRootInfo getMergeRootInfo(final File file, final SvnVcs svnVcs)