Unexpected "stylesheets" tag

[itrascastro]

Testing Symfony 3 I get this error when I follow this example:

http://symfony.com/doc/current/cookbook/assetic/asset_management.html#cookbook-assetic-including-css

Code:

{% stylesheets 'css/*' filter='cssrewrite' %}
<link rel="stylesheet" href="{{ asset_url }}" />
{% endstylesheets %}

Error:

Unknown "stylesheets" tag in ::base.html.twig at line 14

[wouterj]

As of Symfony 2.8, the AsseticBundle is no longer included in the Symfony Standard Edition. If you want to use Assetic, you have to install & register it:

1. Execute this command: composer require symfony/assetic-bundle
2. Add new Symfony\Bundle\AsseticBundle\AsseticBundle(), to the $bundles array in app/AppKernel.php

As it has been removed just before the 2.8/3.0 releases, we didn't update the docs yet. However, it'll be updated soon by #5973

[itrascastro]

Thank you