removeNode method

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

int removeNode (String name)

Implementation

int removeNode(String name) {
  var e = _entries.remove(name);
  if (e == null) {
    return ZX.ERR_NOT_FOUND;
  }
  _treeEntries.remove(e);
  return ZX.OK;
}