def METHOD_NAME(cls, values_list: list[str] | None, values) -> list[str] | None:
    """Check that the there are at least two values if the parameter is multiple choice without addition."""
    parameter_type = values.get("type")
    if parameter_type == ParameterType.MULTIPLE_CHOICE and (values_list is None or len(values_list) <= 1):
        msg = f"Parameter {values['name']} is multiple choice but has fewer than two values"
        raise ValueError(msg)
    if cls.is_multiple_choice_with_addition(values) and values_list:
        msg = f"Parameter {values['name']} is multiple choice with addition but has values"
        raise ValueError(msg)
    return values_list