public static boolean doRealSeek(KeyValueScanner scanner, ExtendedCell kv, boolean forward)
    throws IOException {
    return forward ? scanner.reseek(kv) : scanner.seek(kv);
  }
A "non-lazy" scanner which always does a real seek operation. Most scanners are inherited from
this class.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/NonLazyKeyValueScanner.java