How to add opencart news module to sitemap?

Question

opencart

Easy News opencart module 1.5.6.
Found this solution:
https://opencartforum.com/topic/27094-google-sitem...
But there is no given file in this path:

"But it's important to add the following code before "public function getNews($data) {" in the catalog/model/catalog/news.php file."

As an option .. there is a file along the path /catalog/model/module
is it possible to insert into it the piece that is written there ..
The contents of the file in module (news.php):

<?php
//-----------------------------------------------------
// News Module for Opencart v1.5.5   							
// Modified by villagedefrance                          			
// [email protected]                         			
//-----------------------------------------------------

class ModelModuleNews extends Model {

  public function updateViewed($news_id) {
    $this->db->query("UPDATE " . DB_PREFIX . "news SET viewed = (viewed + 1) WHERE news_id = '" . (int)$news_id . "'");
  }

  public function getNewsStory($news_id) {
    $query = $this->db->query("SELECT DISTINCT * FROM " . DB_PREFIX . "news n LEFT JOIN " . DB_PREFIX . "news_description nd ON (n.news_id = nd.news_id) LEFT JOIN " . DB_PREFIX . "news_to_store n2s ON (n.news_id = n2s.news_id) WHERE n.news_id = '" . (int)$news_id . "' AND nd.language_id = '" . (int)$this->config->get('config_language_id') . "' AND n2s.store_id = '" . (int)$this->config->get('config_store_id') . "' AND n.status = '1'");
  
    return $query->row;
  }

    public function getNews($start,$limit) {

    $query = $this->db->query("SELECT * FROM " . DB_PREFIX . "news n LEFT JOIN " . DB_PREFIX . "news_description nd ON (n.news_id = nd.news_id) LEFT JOIN " . DB_PREFIX . "news_to_store n2s ON (n.news_id = n2s.news_id) WHERE nd.language_id = '" . (int)$this->config->get('config_language_id') . "' AND n2s.store_id = '" . (int)$this->config->get('config_store_id') . "' AND n.status = '1' ORDER BY n.date_added DESC LIMIT $start, $limit ");

    return $query->rows;
  }

  public function getNewsShorts($limit) {
    $query = $this->db->query("SELECT * FROM " . DB_PREFIX . "news n LEFT JOIN " . DB_PREFIX . "news_description nd ON (n.news_id = nd.news_id) LEFT JOIN " . DB_PREFIX . "news_to_store n2s ON (n.news_id = n2s.news_id) WHERE nd.language_id = '" . (int)$this->config->get('config_language_id') . "' AND n2s.store_id = '" . (int)$this->config->get('config_store_id') . "' AND n.status = '1' ORDER BY n.date_added DESC LIMIT " . (int)$limit); 
     
       
    return $query->rows;
  }

  public function getTotalNews() {
     	$query = $this->db->query("SELECT COUNT(*) AS total FROM " . DB_PREFIX . "news n LEFT JOIN " . DB_PREFIX . "news_to_store n2s ON (n.news_id = n2s.news_id) WHERE n2s.store_id = '" . (int)$this->config->get('config_store_id') . "' AND n.status = '1'");
  
    if ($query->row) {
      return $query->row['total'];
    } else {
      return FALSE;
    }
  }	
}
?>