/** Insert a tuple - return true if it was really added, false if it was a duplicate */ @Override public final boolean add(Tuple<NodeId> tuple) { if ( Check ) { if ( tupleLength != tuple.len() ) throw new TDBException(String.format("Mismatch: tuple length %d / index for length %d", tuple.len(), tupleLength)) ; } return performAdd(tuple) ; } /** Delete a tuple - return true if it was deleted, false if it didn't exist */