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Unable to load the requested class: jquery error in codeigniter

<?php
class Test extends CI_Controller{

function index()
	{ 
	$this->load->library('javascript');
	$this->load->library('javascript/jquery');
}
?>

<?php

class Test extends CI_Controller{

function index()

{

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

$this->load->library('javascript/jquery');

}