/**
  * Runs import of xliff files to the mlp and creates new sites in multisite environment if doesn't exists.
  */
 private function do_xliff2mlp()
 {
     $zip_file = $this->xliff_extractor->check_and_get_xliff_zip($_FILES['xliff_translations']);
     if (!$zip_file) {
         self::$xliff_message = "Please select correct file for upload.";
         return;
     }
     self::check_sites();
     self::create_posts($this->xliff_extractor->extract($zip_file));
 }