private static Consumer<Description> addSelfAndDescendantsTo(
      Collection<Description> descriptions) {
    return parent -> {
      descriptions.add(parent);
      parent.getChildren().forEach(addSelfAndDescendantsTo(descriptions));
    };
  }
Returns a consumer that accepts a Description and adds the description and its descendants to
the given collection.
geode-junit/src/test/java/org/apache/geode/test/junit/runners/GeodeParamsRunnerTest.java