static L<WithURL<S>> googleSearch_all(Browser browser, S query, double cacheExpirationDays default 1) {
  ret googleSearch_all(new GoogleSearch(browser, simpleSpacesAndTrim(lower(gs.query))), cacheExpirationDays);
}

static L<WithURL<S>> googleSearch_all(GoogleSearch gs, double cacheExpirationDays default 1) {
  FileBasedStringMap cache = new(javaxCachesDir("Google Searches"));
  File f = cache.fileForKey(gs.query);
  if (exists(f) && fileAgeInDays(f) < cacheExpirationDays)
    ret (L) unstructure(cache.get(query));
  
  // not in cache, start browser
  
  var result = gs.search_uncached();
  cache.put(query, indentedStructure(result));
  ret result;
}