code: private static List<Tag<?>> getForkMetricsTags(State state, int index) {
      return ImmutableList.<Tag<?>>of(new Tag<>(FORK_METRICS_BRANCH_NAME_KEY, getForkMetricsId(state, index)));
    }
docs: Creates a {@link List} of {@link Tag}s for a {@link Fork} instance. The {@link Tag}s are purely based on the
  index and the branch name.