@NotNull IntSet getCommitsForUsers(@NotNull Set<? extends VcsUser> users) throws IOException, StorageException {
    IntSet ids = new IntOpenHashSet();
    for (VcsUser user : users) {
      ids.add(myUserIndexer.getUserId(user));
    }
    return getCommitsWithAnyKey(ids);
  }
@NotNull IntSet getCommitsForUsers(@NotNull Set<? extends VcsUser> users)