@Override
    public String toString() {
        return toString(this, origins, routes, nullOriginAllowed, credentialsAllowed, maxAge,
                        exposedHeaders, allowedRequestMethods, allowAllRequestHeaders, allowedRequestHeaders,
                        preflightResponseHeaders);
    }
Determines whether all request headers are allowed.

@return true if all request headers are allowed,
        false if only specific request headers are allowed.
core/src/main/java/com/linecorp/armeria/server/cors/CorsPolicy.java