docs: private void runIndexing(Session upperSession, Tuple tuple) {
  		initSession( upperSession );
  		try {
  			index( upperSession, entity( upperSession, tuple ) );
  		}
  		catch (Throwable e) {
  			errorHandler.handleException( log.massIndexerUnexpectedErrorMessage(), e );
  		}
  		finally {
  			log.debug( "finished" );
  		}
  	}