@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        CidrBlock cidrBlock = (CidrBlock) o;
        return prefixLength == cidrBlock.prefixLength &&
               Objects.equals(addressInteger, cidrBlock.addressInteger);
    }
@return iterable over all CIDR blocks of the same prefix size, from the current one and up
vespajlib/src/main/java/ai/vespa/net/CidrBlock.java