Akka.Cluster.AutoDownBase.DownOrAddPending C# (CSharp) Method

        private void DownOrAddPending(UniqueAddress node)
        {
            if (_leader)
            {
                Down(node.Address);
            }
            else
            {
                // it's supposed to be downed by another node, current leader, but if that crash
                // a new leader must pick up these
                _pendingUnreachable = _pendingUnreachable.Add(node);
            }
        }