return NS_ERROR_FAILURE;
nsIFrame* result; nsIFrame* parent = getCurrent(); while (!IsRootFrame(parent) && (result = GetParentFrame(parent))) parent = result;  while ((result = GetFirstChild(parent))) { parent = result; while ((result = GetNextSibling(parent))) parent = result; }  setCurrent(parent); if (!parent) setOffEdge(1); return NS_OK;
nsFrameIterator::Last(){  return NS_ERROR_FAILURE;}