case 'NOTES':
                $unique_id_name = 'note_id';
                break;
            default:
                return false;
        }
        return $unique_id_name;
    }
    /**
     * returns the table name according to its identifier
     *
     * @param string $model_identifier
     * @return string
     */
    public static function get_table_name_for($model_identifier)
    {
        global $wpdb;
        if (isset(self::$table_name_for[$model_identifier])) {
            return $wpdb->prefix . self::$table_name_for[$model_identifier];
        }
    }
    public static function delete_and_reset_table($identifier)
    {
        global $wpdb;
        $table_name = self::get_table_name_for($identifier);
        $qry = "TRUNCATE `{$table_name}`";
        $wpdb->query($qry);
    }
}
$RM_Table_Tech = RM_Table_Tech::get_instance();