addNode method

*[<Null safety>](https://dart.dev/null-safety)*

• @override

int addNode (String name, Vnode node)

override

Implementation

@override
int addNode(String name, Vnode node) {
  if (_inheritedNodes.contains(name)) {
    return ZX.ERR_ALREADY_EXISTS;
  } else {
    return super.addNode(name, node);
  }
}