@Override
    public String toString() {
      StringBuilder sb = new StringBuilder();
      sb.append("(" + super.toString() + ", ");
      sb.append("cappedCount " + cappedCount() + ")");
      return sb.toString();
    }
Setup for a match outright.
@param hashMapStore
@param refWord
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/mapjoin/fast/VectorMapJoinFastBytesHashMapStore.java