@Override
  public boolean reseek(ExtendedCell kv) throws IOException {
    if (checkFlushed()) {
      reopenAfterFlush();
    }
    if (explicitColumnQuery && lazySeekEnabledGlobally) {
      return heap.requestSeek(kv, true, useRowColBloom);
    }
    return heap.reseek(kv);
  }
Do a reseek in a normal StoreScanner(scan forward)
@return true if scanner has values left, false if end of scanner
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java