public QueryParamsMap get(String... keys) {
        QueryParamsMap ret = this;
        for (String key : keys) {
            if (ret.queryMap.containsKey(key)) {
                ret = ret.queryMap.get(key);
            } else {
                ret = NULL;
            }
        }
        return ret;
    }
Returns an element from the specified key. <br>
For querystring: <br>
<br>
user[name]=fede
<br>
<br>
get("user").get("name").value() #  fede
<br>
or
<br>
get("user","name").value() #  fede

@param keys The parameter nested key(s)
@return the query params map
src/main/java/spark/QueryParamsMap.java