isSupported method
override
Returns true if the XEP is supported on the server. If not, returns false
Implementation
@override
Future<bool> isSupported() async {
if (_gotSupported) return _supported;
// Query the server
final disco = getAttributes().getManagerById<DiscoManager>(discoManager)!;
_supported = await disco.supportsFeature(
getAttributes().getConnectionSettings().serverJid,
blockingXmlns,
);
_gotSupported = true;
return _supported;
}