Override list view twig template in SonataAdminBundle

admin.yml

# Acme\DemoBundle\Resources/config/admin.yml
services:
    sonata.admin.foo:
        class: Acme\DemoBundle\Admin\FooAdmin
        tags:
            - { name: sonata.admin, manager_type: orm, group: "Foo", label: "Foo" }
        arguments:
            - ~
            - Acme\DemoBundle\Entity\Foo
            - ~            
        calls:
            - [ setTemplate, [list, AcmeDemoBundle:FooAdmin:list.html.twig]]

FooAdmin.php

<?php

namespace Acme\DemoBundle\Admin;

use Sonata\AdminBundle\Admin\Admin;

class FooAdmin extends Admin
{
    public function getTemplate($name)
    {
        switch ($name) {
            case 'list':
                return 'Acme\DemoBundle:FooAdmin:list.html.twig';
                break;
 
            default:
                return parent::getTemplate($name);
                break;
        }
    }
}

list.html.twig

# AcmeDemoBundle:FooAdmin:list.html.twig

{% extends 'SonataAdminBundle:CRUD:base_list.html.twig' %}

{% block list_header %}
    Here is a list Foos:
{% endblock %}

Add function in FooAdmin is not utils :)