// tok must come from htmlTok
// returns all tags found
// honors nested tags correctly
static LS findTagsWithParams(S tag, LS tok, O... params) {
  new LS l;
  for (S t : codeTokens(tok))
    if (tagIs(t, tag) && htmlCheckParams(t, params))
      l.add(t);
  ret l;
}

static LS mapMethodLike findTagsWithParams(S tag, S html, O... params) {
  ret findTagsWithParams(tag, htmlTok(html), params);
}

Began life as a copy of #1008443