Return the most frequent value in list.
    If there is no unique one, return the maximum of the most frequent values

    :param values:
    :return:

def get_most_frequent_value(values: list):
    """
    Return the most frequent value in list.
    If there is no unique one, return the maximum of the most frequent values

    :param values:
    :return:
    """
    if len(values) == 0:
        return None

    most_common = Counter(values).most_common()
    result, max_count = most_common[0]
    for value, count in most_common:
        if count < max_count:
            return result
        else:
            result = value

    return result