NS_IMETHODIMP nsWebShell::GetParent(nsIDocShellTreeItem** parent)
nsWebShell::GetParent(nsIWebShell*& aParent)
NS_IMETHODIMP nsWebShell::GetParent(nsIDocShellTreeItem** parent){   NS_ENSURE_ARG_POINTER(parent);   *parent = mParent;   NS_IF_ADDREF(*parent);   return NS_OK;}