Overriding laravel 5 dependencies

I have RequestInterface.php

like this:

    <?PHP
namespace App\Http\Requests;

interface RequestInterface {

}

      

        
        
        
      

    

and an abstract class Request.php

:

<?php namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;


abstract class Request extends FormRequest implements RequestInterface {

    //
}

      

        
        
        
      

    

and I have PagesRequest.php

one that extends from Request.php

:

<?php namespace App\Http\Requests;

use App\Helpers\Helpers;

class PageRequest extends Request implements RequestInterface  {

      

        
        
        
      

    

In the controller, I have to inject the PageRquest method and override the edit()

class CrudController

and test the injection in another class like this:

PageController.php:

protected function update( $id, PageRequest $request){
    parent::update( $request, $id);
}

      

        
        
        
      

    

and the file I have to check the nested class to have the RequestInterface:

   protected function update($id, RequestInterface $request)
    {
}

      

        
        
        
      

    

But I have this error

Application declaration \ Http \ Controllers \ PagesController :: update () must be compatible with App \ Http \ Controllers \ MasterController \ CrudController :: Update ($ ID, Application \ Http \ Requests \ RequestInterface $ request)

The parent class Request

implements RequestInterface

and PageRequest

extended with Request

, so it PageRequest

has an interface RequestInterface

, but I am getting this error.