public SELF decodeIdn(boolean decodeIdn) {
        this.decodeIdn = decodeIdn;
        return self();
    }
Sets if the domain and host names should be decoded to unicode when received.
See <a href="https://datatracker.ietf.org/doc/rfc3492/">rfc3492</a>. This flag is enabled by default.
core/src/main/java/com/linecorp/armeria/client/AbstractDnsResolverBuilder.java