Deque deque = new Deque();
deque.add( new Integer( 4 ) );
deque.add( new Integer( -2 ) );
deque.add( new Integer( 3 ) );
UnaryFunction function = new NegateNumber();
System.out.println( "before = " + deque );
Transforming.transform( deque, deque.begin(), function );
System.out.println( "after = " + deque );
