if (aTitle) { mTitle = aTitle; } else { mTitle.SetLength(0); }
NS_ENSURE_ARG_POINTER(aTitle); mTitle = aTitle;
NS_IMETHODIMP nsPrintOptions::SetTitle(const PRUnichar * aTitle){  if (aTitle) {    mTitle = aTitle;  } else {    mTitle.SetLength(0);  }  return NS_OK;}