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CS269: HW/SW Engineering of Embedded Systems, Winter02
Structure of a Visitor (2)
•   public Object visitCompileUnitNode
•   
•    }   
(ConstraintBlockNode node,
LinkedList args) {
      return null;
   public Object visitLabeledBlockNode (LabeledBlockNode node, LinkedList args) {
         return null;
    }  
   protected Object _defaultVisit(TreeNode node, LinkedList args) {
         return null;
   }
}