code: public RequiredConfigPropertyType<ActivationspecType<T>> getOrCreateRequiredConfigProperty()
     {
        List<Node> nodeList = childNode.get("required-config-property");
        if (nodeList != null &&  nodeList.size() > 0)
        {
           return new RequiredConfigPropertyTypeImpl<ActivationspecType<T>>(this, "required-config-property", childNode, nodeList.get(0));
        }
        return createRequiredConfigProperty();
     }
docs: If not already created, a new <code>required-config-property</code> element will be created and returned.
  Otherwise, the first existing <code>required-config-property</code> element will be returned.
  @return the instance defined for the element <code>required-config-property</code>