@Override
  public <R extends Message> void batchCoprocessorService(MethodDescriptor methodDescriptor,
    Message request, byte[] startKey, byte[] endKey, R responsePrototype, Callback<R> callback)
    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