public ClientFactoryBuilder http1HeaderNaming(Http1HeaderNaming http1HeaderNaming) {
        requireNonNull(http1HeaderNaming, "http1HeaderNaming");
        option(ClientFactoryOptions.HTTP1_HEADER_NAMING, http1HeaderNaming);
        return this;
    }
Sets the {@link Http1HeaderNaming} which converts a lower-cased HTTP/2 header name into
another HTTP/1 header name. This is useful when communicating with a legacy system that only supports
case-sensitive HTTP/1 headers.
core/src/main/java/com/linecorp/armeria/client/ClientFactoryBuilder.java