@Override
  public KeyValue next() {
    // throw runtime exception perhaps?
    throw new RuntimeException("Never call StoreScanner.next()");
  }
Filters the given list of scanners using Bloom filter, time range, and TTL.
<p>
Will be overridden by testcase so declared as protected.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java