Clean all of the property starts with "_" then
    return result of vars(object).

def vars_(object=None):
    """
    Clean all of the property starts with "_" then
    return result of vars(object).
    """
    filtered_vars = {}
    vars_dict = vars(object)
    for key, value in six.iteritems(vars_dict):
        if key.startswith("_"):
            continue
        filtered_vars[_normalize_arg_name(key)] = value
    return filtered_vars