for (int i = 0; i < elements.length; i++) {
        builder.put(i, elements[i]);
      }
      return builder.buildOrThrow().values().asList();
    }
  }

  public static class ImmutableMapEntryListGenerator
      implements TestListGenerator<Entry<String, Integer>> {

    @Override
    public SampleElements<Entry<String, Integer>> samples() {
      return new SampleElements<>(
          mapEntry("foo", 5),