@Override
        public RequestCacheControl getRequestCacheControl() {
            return clientContext.getAttribute(REQUEST_CACHE_CONTROL, RequestCacheControl.class);
        }
Internal adaptor class that delegates all its method calls to {@link HttpClientContext}.
To be removed in the future.
httpclient5-cache/src/main/java/org/apache/hc/client5/http/cache/HttpCacheContext.java