@NonNls
  private static String getRevisionHeadingPath(@NotNull FilePatch patch, boolean beforePath) {
    if (beforePath) {
      return patch.isNewFile() ? DEV_NULL : A_PREFIX + patch.getBeforeName();
    }
    else {
      return patch.isDeletedFile() ? DEV_NULL : B_PREFIX + patch.getAfterName();
    }
  }
@NonNls
  private static String getRevisionHeadingPath(@NotNull FilePatch patch, boolean beforePath)