private static function getPageStreamingDescriptors() { $listSinksPageStreamingDescriptor = new PageStreamingDescriptor(['requestPageTokenField' => 'page_token', 'requestPageSizeField' => 'page_size', 'responsePageTokenField' => 'next_page_token', 'resourceField' => 'sinks']); $pageStreamingDescriptors = ['listSinks' => $listSinksPageStreamingDescriptor]; return $pageStreamingDescriptors; }