in lib/src/copy/web_socket_impl.dart [636:645]
bool _done([Object? error, StackTrace? stackTrace]) {
if (_completer == null) return false;
if (error != null) {
_completer!.completeError(error, stackTrace);
} else {
_completer!.complete(webSocket);
}
_completer = null;
return true;
}