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      means any form of electronic, verbal, or written communication sent

      to that Work or Derivative Works thereof, that is intentionally
      submitted to Licensor for inclusion in the Work by the copyright owner
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      means any form of electronic, verbal, or written communication sent

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            cb.fetchFirst(fessConfig.getPageThumbnailQueueMaxFetchSizeAsInteger());
        }).stream().map(entity -> {
            idList.add(entity.getId());
            if (!cleanup) {
                return executorService.submit(() -> process(fessConfig, entity));
            }
            if (logger.isDebugEnabled()) {
                logger.debug("Removing thumbnail queue: {}", entity);
            }
            return null;