def METHOD_NAME(comma_separated_ids: str) -> List[str]:
    """Normalizes a string of comma-separated question IDs into a list of
    question IDs.
    Args:
        comma_separated_ids: str. Comma separated question IDs.
    Returns:
        list(str). A list of question IDs.
    """
    if not comma_separated_ids:
        return list([])
    return list(comma_separated_ids.split(','))