nsIFrame *result; aFrame->GetNextSibling(&result);
nsIFrame *result = aFrame->GetNextSibling();
GetNextSiblingAcrossLines(nsIPresContext *aPresContext, nsIFrame *aFrame){  aFrame = aFrame->GetLastInFlow();  nsIFrame *result;  aFrame->GetNextSibling(&result);  if (result)    return result;  nsIFrame *parent;  aFrame->GetParent(&parent);  parent->GetNextInFlow(&parent);  if (!parent)    return nsnull;  parent->FirstChild(aPresContext, nsnull, &result);  return result;}