@Nullable
    private AbstractVcs getVcs(@NotNull BaseRevision baseRevision) {
      AbstractVcs vcs = baseRevision.getVcs();
      if (vcs != null) return vcs;
      return myVcsManager.getVcsFor(baseRevision.getFilePath());
    }
@Nullable
    private AbstractVcs getVcs(@NotNull BaseRevision baseRevision)