public static HttpCacheEntry makeCacheEntry(final Header[] headers, final byte[] bytes) {
        final Instant now = Instant.now();
        return makeCacheEntry(now, now, headers, bytes);
    }
Generates a response body with random content.
 @param nbytes length of the desired response body
 @return an {@link HttpEntity}
httpclient5-cache/src/test/java/org/apache/hc/client5/http/impl/cache/HttpTestUtils.java