private String baseUrl(HttpRequest request) {
       URI uri = request.getUri();
       StringBuilder sb = new StringBuilder();
       sb.append(uri.getScheme()).append("://");
       if (request.getHeader("Host") != null) {
           sb.append(request.getHeader("Host"));
       } else {
           sb.append(uri.getHost());
           if (uri.getPort() >= 0) {
               sb.append(":").append(uri.getPort());
           }
       }
       sb.append("/").append(API_ROOT).append("/").append(VERSION_V1).append("/");
       return sb.toString();
    }
A dash in this key ensures it does not collide with feature names
model-evaluation/src/main/java/ai/vespa/models/handler/ModelsEvaluationHandler.java