@UnstableApi
    public AbstractClientOptionsBuilder successFunction(SuccessFunction successFunction) {
        return option(ClientOptions.SUCCESS_FUNCTION, successFunction);
    }
Sets a {@link SuccessFunction} that determines whether a request was handled successfully or not.
If unspecified, {@link SuccessFunction#ofDefault()} is used.
core/src/main/java/com/linecorp/armeria/client/AbstractClientOptionsBuilder.java