private static boolean isKnownNonCacheableStatusCode(final int status) {
        return status == HttpStatus.SC_PARTIAL_CONTENT;
    }
Determine if the {@link HttpResponse} gotten from the origin is a
cacheable response.

@return {@code true} if response is cacheable
httpclient5-cache/src/main/java/org/apache/hc/client5/http/impl/cache/ResponseCachingPolicy.java