FastQuant.GroupDispatcher.OnNewGroupUpdate C# (CSharp) Méthode

        private void OnNewGroupUpdate(object sender, GroupUpdateEventAgrs args)
        {
            lock (this)
            {
                if (args.GroupUpdate.GroupId != -1)
                {
                    var list = this.listenersByGroupId[args.GroupUpdate.GroupId];
                    list?.ForEach(l => l.OnNewGroupUpdate(args.GroupUpdate));
                }
            }
        }