@Nullable
    public String getLastName() {
      if (myPatches.isEmpty()) {
        return null;
      }
      else {
        final FilePatch patch = myPatches.get(myPatches.size() - 1);
        return patch.getBeforeName() == null ? patch.getAfterName() : patch.getBeforeName();
      }
    }
@Nullable
    public String getLastName()