@Nullable
    MeterRegistry meterRegistry0() {
        return meterRegistry();
    }
Sets the timeout in milliseconds after which a refreshing {@link DnsRecord} should expire.
If this option is unspecified and {@link #enableAutoRefresh(boolean)} is set to
{@code true}, a cached {@link DnsRecord} is automatically refreshed until the {@link ClientFactory}
is closed. {@code 0} disables the timeout.
core/src/main/java/com/linecorp/armeria/client/DnsResolverGroupBuilder.java