Lumen Dependency Injection - php

Question

As the last comment of this post it states the following:
You can easily do it in any service provider (boot would be a nice place since we can use method based DI).
public function boot(\Illuminate\Contracts\Http\Kernel $kernel) {
$kernel->appendMiddleware('Sheepy85\L5Localization\Middleware\Localization'); // prependMiddleware works too.
}
This is Laravel Code for injecting a middleware from a Service Provider.
I am trying to achieve the same thing from Lumen Framework, here's the code:
<?php namespace Acme\Slz\Providers;
use Illuminate\Contracts\Http\Kernel;
use Illuminate\Support\ServiceProvider;
class SlzServiceProvider extends ServiceProvider
{
/**
* Bootstrap any application services.
* #param Kernel $kernel
* #return void
*/
public function boot(Kernel $kernel)
{
// push the serializer middleware to the stack
$kernel->pushMiddleware(Acme\Slz\Middleware\Serializer::class);
}
/**
* Register any application services.
* This service provider is a great spot to register your various container
* bindings with the application. As you can see, we are registering our
* #return void
*/
public function register()
{
}
}
But this raise the following error:
lumen.ERROR: exception 'ErrorException' with message 'Argument 1 passed to Acme\Slz\Providers\SlzServiceProvider::boot() must be an instance of Illuminate\Contracts\Http\Kernel, none given
Are there some more stuffs to do to enable the Dependency Container with Lumen ?

Answer 1

How about this:
<?php namespace Acme\Slz\Providers;
use Illuminate\Support\ServiceProvider;
class SlzServiceProvider extends ServiceProvider
{
/**
* Bootstrap any application services.
*
* #return void
*/
public function boot()
{
// push the serializer middleware to the stack
$this->app->middleware([
'serializer' => 'Acme\Slz\Middleware\Serializer',
]);
}
}