public CorsServiceBuilder allowAllRequestHeaders(boolean allowAllRequestHeaders) {
        firstPolicyBuilder.allowAllRequestHeaders(allowAllRequestHeaders);
        return this;
    }
Sets whether to allow all HTTP headers in the CORS {@code "Access-Control-Request-Headers"} request
header.

<p>The server will set the CORS {@code "Access-Control-Allow-Headers"} to be as same as the CORS
{@code "Access-Control-Request-Headers"} header in the request if this property is {@code true}.
The default value of this property is {@code false}.

@return {@link CorsServiceBuilder} to support method chaining.
core/src/main/java/com/linecorp/armeria/server/cors/CorsServiceBuilder.java