@Override
  public void onConfigurationChange(Configuration conf) {
    Configuration storeConf = StoreUtils.createStoreConfiguration(conf, region.getTableDescriptor(),
      getColumnFamilyDescriptor());
    this.conf = storeConf;
    this.storeEngine.compactionPolicy.setConf(storeConf);
    this.offPeakHours = OffPeakHours.getInstance(storeConf);
  }
Returns the StoreEngine that is backing this concrete implementation of Store.
@return Returns the {@link StoreEngine} object used internally inside this HStore object.
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStore.java