boolean isResponseNoCache(final ResponseCacheControl responseCacheControl, final HttpCacheEntry entry) {
        // If no-cache directive is present and has no field names
        if (responseCacheControl.isNoCache()) {
            final Set<String> noCacheFields = responseCacheControl.getNoCacheFields();
            if (noCacheFields.isEmpty()) {
                LOG.debug("Revalidation required due to unqualified no-cache directive");
                return true;
            }
            for (final String field : noCacheFields) {
                if (entry.containsHeader(field)) {
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("Revalidation required due to no-cache directive with field {}", field);
                    }
                    return true;
                }
            }
        }
        return false;
    }
Determines if the given {@link HttpCacheEntry} requires revalidation based on the presence of the {@code no-cache} directive
in the Cache-Control header.
<p>
The method returns true in the following cases:
- If the {@code no-cache} directive is present without any field names (unqualified).
- If the {@code no-cache} directive is present with field names, and at least one of these field names is present
in the headers of the {@link HttpCacheEntry}.
<p>
If the {@code no-cache} directive is not present in the Cache-Control header, the method returns {@code false}.
httpclient5-cache/src/main/java/org/apache/hc/client5/http/impl/cache/CachedResponseSuitabilityChecker.java