private void logRegionFiles() {
    if (LOG.isTraceEnabled()) {
      LOG.trace(getRegionInfo().getEncodedName() + " : Store files for region: ");
      stores.values().stream().filter(s -> s.getStorefiles() != null)
        .flatMap(s -> s.getStorefiles().stream())
        .forEachOrdered(sf -> LOG.trace(getRegionInfo().getEncodedName() + " : " + sf));
    }
  }
If all stores ended up dropping their snapshots, we can safely drop the prepareFlushResult
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java