code: public function reply($msgId, $index, $commentId, $content)
      {
          $params = [
              'msg_data_id' => $msgId,
              'index' => $index,
              'user_comment_id' => $commentId,
              'content' => $content,
          ];
  
          return $this->parseJSON('json', [self::API_REPLY_COMMENT, $params]);
      }
docs: Reply to a comment.
  
  @param string $msgId
  @param int    $index
  @param int    $commentId
  @param string $content
  
  @return \EasyWeChat\Support\Collection