>>>
class Foo {
  Stream<
      api
          .CreateRecipientSourceFromGroupResponse> createRecipientSourceFromGroup(
      String groupName, int campaignId, String languagePreference);
}
<<<
class Foo {
  Stream<api.CreateRecipientSourceFromGroupResponse>
      createRecipientSourceFromGroup(
          String groupName, int campaignId, String languagePreference);
}