                          <dd><code>provider</code> - provider name</dd>
                                    <dd><code>howOldCanBe</code> - optional. How old a location can
                                        be
                                    </dd>
                                    <dd><code>isNullValid</code> - if true, then this request can
                                        emit null value
                                    </dd>
                                    <dd><code>transformer<