Users.php

<?php

class Users extends Nmc_Db_Table
{
    protected $_primary = 'userId';
    protected $_rowClass = 'User';

    static private $_instance;

    /**
     * Return the one true instance
     *
     * @param array $config
     * @return Users
     */
    static public function getInstance($config = array())
    {
        if(!self::$_instance) {
            self::$_instance = new Users($config);
        }
        return self::$_instance;
    }

    public function fetchAll($where = null, $order = 'userName', $count = null, $offset = null)
    {
        return parent::fetchAll($where, $order, $count, $offset);
    }
}

?>