nsHTMLEditor::AddStyleSheet(nsICSSStyleSheet* aSheet)
nsHTMLEditor::AddStyleSheet(const nsAString &aURL)
nsHTMLEditor::AddStyleSheet(nsICSSStyleSheet* aSheet){	AddStyleSheetTxn* txn;	nsresult rv = CreateTxnForAddStyleSheet(aSheet, &txn);  if (!txn) rv = NS_ERROR_NULL_POINTER;	if (NS_SUCCEEDED(rv))	{	  rv = Do(txn);	  if (NS_SUCCEEDED(rv))	  {	    mLastStyleSheet = do_QueryInterface(aSheet);		// save it so we can remove before applying the next one	  }	}		return rv;}