code: public Decision<Flow<T>> getOrCreateDecision()
     {
        List<Node> nodeList = childNode.get("decision");
        if (nodeList != null &&  nodeList.size() > 0)
        {
           return new DecisionImpl<Flow<T>>(this, "decision", childNode, nodeList.get(0));
        }
        return createDecision();
     }
docs: If not already created, a new <code>decision</code> element will be created and returned.
  Otherwise, the first existing <code>decision</code> element will be returned.
  @return the instance defined for the element <code>decision</code>