:sig
StringMap parse_query(String q)

:params
q : string containing URL parameters
return value : a StringMap containing the parameters

:desc
Decodes a string of the format 'a=b&c=d' into a StringMap containing keyed entries.

:see
>uri

:related
**PHP:** `parse_str()`
**JavaScript / Node.js:** `URLSearchParams` or Node `querystring.parse()`