// e.g. [[bla=1, blubb="blu"]]
static SS parseEqualsCommaProperties(S s) {
  SS map = litorderedmap();
  for (S t : tok_splitAtComma(s)) {
    PairS p = tok_splitAtEquals_pair(t);
    if (p != null)
      map.put(p.a, p.b);
  }
  ret map;
}