@Override
  public <T extends Service, R> Map<byte[], R> coprocessorService(Class<T> service, byte[] startKey,
    byte[] endKey, Call<T, R> callable) throws ServiceException, Throwable {
    throw new UnsupportedOperationException();
  }
This call will NOT close the underlying region.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/RegionAsTable.java