public ConfigEvaluatorBuilder addExternalProperties(Map<String, String> properties) {
    evaluatorBuilder.addExternalProperties(properties);
    return this;
  }
@Test
  public void addExternalProperties() {
    var builder = ConfigEvaluatorBuilder.unconfigured();
    builder.addExternalProperty("ONE", "one");
    var properties = Map.of("TWO", "two", "THREE", "three");
    builder.addExternalProperties(properties);

    assertThat(builder.getExternalProperties()).hasSize(3);
    assertThat(builder.getExternalProperties()).containsEntry("ONE", "one");
    assertThat(builder.getExternalProperties()).containsAllEntriesOf(properties);
  }