private void extractQueryTemplates(String queryString, boolean append) {
    /* split the query string up into name value pairs */
    Map<String, List<String>> queryParameters =
        Arrays.stream(queryString.split("&"))
            .map(this::splitQueryParameter)
            .collect(
                Collectors.groupingBy(
                    SimpleImmutableEntry::getKey,
                    LinkedHashMap::new,
                    Collectors.mapping(Entry::getValue, Collectors.toList())));

    /* add them to this template */
    if (!append) {
      /* clear the queries and use the new ones */
      this.queries.clear();
    }
    queryParameters.forEach(this::query);
  }
The Query String for the template. Expressions are not resolved.

@return the Query String.
core/src/main/java/feign/RequestTemplate.java