call method
Implementation
Future<Result> call(
String procedure, {
List<dynamic>? args,
Map<String, dynamic>? kwargs,
Map<String, dynamic>? options,
}) {
var call = msg.Call(_nextID, procedure, args: args, kwargs: kwargs, options: options);
var completer = Completer<Result>();
_callRequests[call.requestID] = completer;
_baseSession.send(_wampSession.sendMessage(call));
return completer.future;
}