code: public Collection<KeyTransaction> list(String name)
      {
          List<KeyTransaction> ret = new ArrayList<KeyTransaction>();
          Collection<KeyTransaction> transactions = list();
          for(KeyTransaction transaction : transactions)
          {
              if(name == null || transaction.getName().equals(name))
                  ret.add(transaction);
          }
          return ret;
      }
docs: Returns the set of key transactions for the given name.
  @param name The name of the transactions
  @return The set of transactions