CqlSharp.CqlConnection.OpenAsyncInternal C# (CSharp) Метод

        private Task OpenAsyncInternal(CancellationToken cancellationToken)
        {
            //check state. If closed, a new OpenTask can be created;
            if(State == ConnectionState.Closed)
            {
                lock(_syncLock)
                {
                    if(State == ConnectionState.Closed)
                    {
                        //get a logger
                        var logger = LoggerManager.GetLogger("CqlSharp.CqlConnection.Open");

                        //if cluster is already open, use fastpath
                        if(Cluster.IsOpen)
                        {
                            CompleteOpen(logger);
                            _openTask = TaskCache.CompletedTask;
                        }
                        else
                            _openTask = OpenAsyncInternal2(logger, cancellationToken);
                    }
                }
            }

            return _openTask;
        }