Laravel 5 class inheritance

I am working with laravel 5 code.

I cannot extend a class that has a different namespace than the child.

My parent class Folder is App / Http / Controllers /

namespace App\Http\Controllers;

use Illuminate\Routing\Controller as BaseController;

class MainController extends BaseController{

    function __construct() {

    }            

    function home() {
         echo "main";
    }


}

      

        
        
        
      

    

And my class child Folder is App / Http / Controllers / Site

namespace App\Http\Controllers\Site;

class SiteController extends MainController {

    function __construct() {

        parent::__construct();
    }

    function home() {

        return view('dashboard');
    }
}

      

        
        
        
      

    

And my routes file has this route

Route::get('/', 'Site\SiteController@home');

      

        
        
        
      

    

This is the error I am getting

 FatalErrorException in SiteController.php line 5: Class 'App\Http\Controllers\Site\MainController' not found

      

        
        
        
      

    

This is clearly a namespace problem, because when I do

Route::get('/', 'Site\SiteController@home');

      

        
        
        
      

    

This is the echos home method in MainController

How do I get this to work?