public void add(final String host, final InetAddress... ips) {
        Args.notNull(host, "Host name");
        Args.notNull(ips, "Array of IP addresses");
        dnsMap.put(host, ips);
    }
Associates the given array of IP addresses to the given host in this DNS overrider.
The IP addresses are assumed to be already resolved.

@param host
           The host name to be associated with the given IP.
@param ips
           array of IP addresses to be resolved by this DNS overrider to the given
           host name.
httpclient5/src/main/java/org/apache/hc/client5/http/impl/InMemoryDnsResolver.java