def METHOD_NAME(cidr, new_size):
    """
    Given a cidr, it upgrade is netmask to new_size.
    :param cidr: the list of cidr to promote
    :param new_size: the minimum bitmask required
    """
    ip_addr = ip_network(unicode(cidr))
    return str(ip_addr.supernet(new_prefix=new_size))