static L<SnippetVersion> versionsOfSnippetWithText(S snippetID) {
  L<SnippetVersion> l = getVersionsOfSnippet(snippetID);
  for (SnippetVersion v : l)
    if (v.versionID != 0 && eqic(v.comment, "Text changed"))
      v.previousValue = loadPage("http://tinybrain.de:8080/tb/get-version.php?id=" + psI(v.snippetID) + "&v_id=" + v.versionID);
  ret l;
}