code: protected function renderV1()
      {
          if ('google' == $this->requestSource) {
              $out = [
                  'suggestions' => [],
                  'type'        => 'suggestion_chips',
                  'platform'    => $this->requestSource,
              ];
  
              foreach ($this->replies as $i => $reply) {
                  $out['suggestions'][$i]['title'] = $reply;
              }
  
              return $out;
          } else {
              $out = [
                  'type' => self::v1MessageObjectSuggestions,
              ];
  
              $out['replies'] = $this->replies;
  
              $out['platform'] = $this->requestSource;
  
              return $out;
          }
      }
docs: Render response as array for API V1.
  
  @return array