public Map<String, Collection<String>> queries() {
    Map<String, Collection<String>> queryMap = new LinkedHashMap<>();
    this.queries.forEach(
        (key, queryTemplate) -> {
          List<String> values = new ArrayList<>(queryTemplate.getValues());

          /* add the expanded collection, but lock it */
          queryMap.put(key, Collections.unmodifiableList(values));
        });

    return Collections.unmodifiableMap(queryMap);
  }
Return an immutable Map of all Query Parameters and their values.

@return registered Query Parameters.
core/src/main/java/feign/RequestTemplate.java