Connects the link to the broker.
Source
Future connect() {
if (_connectedCompleter == null) {
_connectedCompleter = new Completer();
}
if (!_configured || !_initialized) {
init();
}
if (_ready) {
link.onConnected.then(_connectedCompleter.complete);
if (link != null) link.connect();
} else {
_connectOnReady = true;
}
return _connectedCompleter.future;
}