Class dictionary:
======================================

Department = "department" Computer.
Computer = "computer" <localMem> Integer.

Behavior file:
======================================

SummingVisitor = <total> Integer.
Main = .

SummingVisitor {
  before Computer (@ total = 
    new Integer(total.intValue() + host.get_localMem().intValue()); @) }
Department {
  traversal allComputers(SummingVisitor s) {
    to Computer; }
  (@ 
  int computeMemory() throws Exception {
    SummingVisitor s = SummingVisitor.parse("0");
    this.allComputers(s);
    return s.get_total().intValue(); } @) }

Main {
(@
  static public void main(String args[]) throws Exception {
    Department dep = Department.parse(System.in);
    int r = dep.computeMemory();
    if (r != 20)
	  System.out.println("FAILURE");
	      else
		    System.out.println("SUCCESS");              
    System.out.println("Total memory: " + r);
  }
@)
}

Input:
======================================
department 
  computer 20