@NotNull
  @Override
  public CommittedChangeList zip(@NotNull RepositoryLocationGroup group, @NotNull List<? extends CommittedChangeList> lists) {
    if (lists.size() == 1) {
      return lists.get(0);
    }
    final CommittedChangeList result = lists.get(0);

    Set<Change> processed = new HashSet<>(result.getChanges());

    for (int i = 1; i < lists.size(); i++) {
      for (Change change : lists.get(i).getChanges()) {
        if (!processed.add(change)) {
          result.getChanges().add(change);
        }
      }
    }
    return result;
  }
@NotNull
  @Override
  public CommittedChangeList zip(@NotNull RepositoryLocationGroup group, @NotNull List<? extends CommittedChangeList> lists)