// First, run "composer require symfony/property-info"
// and "composer require phpstan/phpdoc-parser"
// Then, execute this file:
<?php

require 'vendor/autoload.php';

class Role
{
    public function __construct(
        public readonly string $name,
    ) {
    }
}

class User
{
    /**
     * @param list<Role> $roles
     */
    public function __construct(
        public readonly array $roles,
    ) {
    }
}

$extractor = new \Symfony\Component\PropertyInfo\Extractor\PhpStanExtractor();
$types = $extractor->getTypes(User::class, 'roles');

// It will throw an error about an hidden dependency on \phpDocumentor\Reflection\Types\ContextFactory::class

final class PhpStanExtractor implements PropertyTypeExtractorInterface, ConstructorArgumentTypeExtractorInterface 
{
...        
    public function __construct(array $mutatorPrefixes = null, array $accessorPrefixes = null, array $arrayMutatorPrefixes = null)
    {
        if (!class_exists(\phpDocumentor\Reflection\Types\ContextFactory::class)) {
            throw new \LogicException(sprintf('Unable to use the "%s" class as the "phpdocumentor/reflection-docblock" package is not installed.', __CLASS__));
        }
...