static S appendQueryToURL(S url, Map params) {
  if (url == null) null;
  S data = makePostData(params);
  ret empty(data) ? url : url + (url.contains("?") ? "&" : "?") + data;
}

static S appendQueryToURL(S url, O... data) {
  ret appendQueryToURL(url, litmap(data));
}

Began life as a copy of #1013971