@Override
  public boolean requestSeek(ExtendedCell c, boolean forward, boolean useBloom) throws IOException {
    return NonLazyKeyValueScanner.doRealSeek(this, c, forward);
  }
This functionality should be resolved in the higher level which is MemStoreScanner, currently
returns true as default. Doesn't throw IllegalStateException in order not to change the
signature of the overridden method
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/SegmentScanner.java