Multiple binding of a class

muli.php

<?php

class Session {
  public function __construct(StorageInterface $storage)
  {
    $this->storage = $storage;
  }
}

class RedisStorage implments StorageInterface {}
class MemcachedStorage implements StorageInterface {}

class Session ServiceProvider extends LaravelServiceProvider {
  public function register ()
  {
    $this->app->bind('session.redis',function($app){
      return new Session(new RedisStorage());
    });  
    
    $this->app->bind('session.memcached',function($app){
      return new Session(new MemcachedStorage());
    });
  }
}