public function get_title()
 {
     $title = parent::get_title();
     if (!empty($_GET['v_e_id']) && !empty(self::$filter_column_mapping['v_e_id']) && intval($_GET['v_e_id'] > 0) && !empty($this->items[0]->e_name)) {
         $title .= ' for event: ' . $this->items[0]->e_name;
     }
     return $title;
 }
 public function __construct()
 {
     $this->singular = __('Template', $this->plugin_slug);
     $this->plural = __('Templates', $this->plugin_slug);
     parent::__construct();
 }