public Optional<Map<String, ParamDefinition>> getDefaultParamsForType(StepType stepType) {
    Map<String, ParamDefinition> defaults =
        defaultTypeParams.get(stepType.toString().toLowerCase(Locale.US));
    if (defaults != null) {
      return Optional.of(preprocessParams(defaults));
    } else {
      return Optional.empty();
    }
  }
@Test
  public void testNullStepTypeParams() {
    assertFalse(defaultParamManager.getDefaultParamsForType(StepType.TITUS).isPresent());
  }