public static HttpCacheEntry makeCacheEntry(final Instant requestDate,
                                                final Instant responseDate,
                                                final Header... headers) {
        return makeCacheEntry(requestDate, responseDate, headers, makeRandomBytes(128));
    }
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