@UnstableApi
    public SELF addDnsQueryListeners(
            Iterable<? extends DnsQueryListener> dnsQueryListeners) {
        requireNonNull(dnsQueryListeners, "dnsQueryListeners");
        for (DnsQueryListener listener: dnsQueryListeners) {
            this.dnsQueryListeners.add(listener);
        }
        return self();
    }
Adds the {@link DnsQueryListener}s which listens to the result of {@link DnsRecord} queries.
If no {@link DnsQueryListener} is configured, {@link DnsQueryListener#of()} is used by default.
core/src/main/java/com/linecorp/armeria/client/endpoint/dns/DnsEndpointGroupBuilder.java