public RequestTemplate query(
      String name, Iterable<String> values, CollectionFormat collectionFormat) {
    return appendQuery(name, values, collectionFormat);
  }
Specify a Query String parameter, with the specified values. Values can be literals or template
expressions.

@param name of the parameter.
@param values for this parameter.
@param collectionFormat to use when resolving collection based expressions.
@return a Request Template for chaining.
core/src/main/java/feign/RequestTemplate.java