NS_IMETHODIMP nsPref::GetFilePref(const char *pref, nsIFileSpec **_retval)
NS_IMETHODIMP nsPref::GetFilePref(const char *pref_name, nsIFileSpec** value)
NS_IMETHODIMP nsPref::GetFilePref(const char *pref, nsIFileSpec **_retval){  nsresult rv;  nsCOMPtr<nsIPrefBranch> prefBranch = do_QueryInterface(mPrefService, &rv);  if (NS_SUCCEEDED(rv))    rv = prefBranch->GetComplexValue(pref, NS_GET_IID(nsIFileSpec), (void **)_retval);  return rv;}