*[<Null safety>](https://dart.dev/null-safety)*
void close ()
override
@override void close() { _isClosed = true; // schedule a task because if user closes this as soon as // they open a connection, dart fidl binding throws exception due to // event on this fidl. scheduleMicrotask(() { for (var c in _connections) { c.closeBinding(); } _connections.clear(); }); }