private void addInsertion(Tuple tuple) throws Exception {
   lInsForInsertions.handleTuple(tuple);
   rDelIfRejectedForInsertions.handleTuple(tuple);
 }
 private void addDeletion(Tuple tuple) throws Exception {
   rInsIfDerivableForDeletions.handleTuple(tuple);
   lDelIfLocalForDeletions.handleTuple(tuple);
 }