public final ResponseCacheControl getResponseCacheControlOrDefault() {
        final ResponseCacheControl cacheControl = getResponseCacheControl();
        return cacheControl != null ? cacheControl : ResponseCacheControl.DEFAULT;
    }
Represents cache control enforced by the server or {@link ResponseCacheControl#DEFAULT}
if not explicitly set in the context.

@since 5.4
httpclient5-cache/src/main/java/org/apache/hc/client5/http/cache/HttpCacheContext.java