private FlushResultImpl internalFlushcache(Collection<HStore> storesToFlush, MonitoredTask status,
    boolean writeFlushWalMarker, FlushLifeCycleTracker tracker) throws IOException {
    return internalFlushcache(this.wal, HConstants.NO_SEQNUM, storesToFlush, status,
      writeFlushWalMarker, tracker);
  }
Flushing given stores.
@see #internalFlushcache(WAL, long, Collection, MonitoredTask, boolean, FlushLifeCycleTracker)
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java