internal override void InvokeInternal(ProcessingContext context, int argCount)
        {
            int iterationCount = context.IterationCount;

            context.PushSequenceFrame();
            if (iterationCount > 0)
            {
                NodeSequence seq = context.CreateSequence();
                seq.StartNodeset();
                SeekableXPathNavigator contextNode = context.Processor.ContextNode;
                long currentPosition = contextNode.CurrentPosition;
                if (XPathMessageFunction.MoveToAddressingHeader(contextNode, "RelatesTo"))
                {
                    seq.Add(contextNode);
                    while (XPathMessageFunction.MoveToAddressingHeaderSibling(contextNode, "RelatesTo"))
                    {
                        seq.Add(contextNode);
                    }
                }
                seq.StopNodeset();
                context.PushSequence(seq);
                for (int i = 1; i < iterationCount; i++)
                {
                    seq.refCount++;
                    context.PushSequence(seq);
                }
                contextNode.CurrentPosition = currentPosition;
            }
        }