private void traceRequestAttributes(Query query) {
        int miminumTraceLevel = 7;
        if (query.getTraceLevel() >= 7) {
            query.trace("Request attributes: " + query.getHttpRequest().context(), miminumTraceLevel);
        }
    }
Used from container SDK, for internal use only
container-search/src/main/java/com/yahoo/search/handler/SearchHandler.java