CODEIGNITER：如何访问包含许多类的库中的方法

as the title say i had filename.php file inside application/libraries

this file contain many class, and every class have at least 1 method. how I do access these method?

because in codeigniter example only assume 1 class for 1 file.

thanks^^

You can't define a class in another class. include your class before

//application/libraries/class1.php
//application/libraries/class2.php
//application/libraries/class3.php
require_once('class1.php');
require_once('class2.php');
require_once('class3.php');

class NewLib
{
    public function class1()
    {
       return new Class1();
    }
    public function class2()
    {
       return new Class2();
    } 
    public function class3()
    {
       return new Class3();
    } 
}

$this->load->library('NewLib');

$class1 = $this->newlib->class1();
$class1->something();