code: public CrossParameterType<MethodType<T>> getOrCreateCrossParameter()
     {
        Node node = childNode.getOrCreate("cross-parameter");
        CrossParameterType<MethodType<T>> crossParameter = new CrossParameterTypeImpl<MethodType<T>>(this, "cross-parameter", childNode, node);
        return crossParameter;
     }
docs: If not already created, a new <code>cross-parameter</code> element with the given value will be created.
  Otherwise, the existing <code>cross-parameter</code> element will be returned.
  @return  a new or existing instance of <code>CrossParameterType<MethodType<T>></code>