yield from example

class LazyIterator implements \IteratorAggregate
{
    private \Closure $iteratorFactory;

    public function __construct(callable $iteratorFactory)
    {
        $this->iteratorFactory = $iteratorFactory(...);
    }

    public function getIterator(): \Traversable
    {
        yield from ($this->iteratorFactory)();
    }
}

                }
            }

            return;
        }

        if (!class_exists(Finder::class)) {
            throw new \LogicException('Extended glob patterns cannot be used as the Finder component is not installed. Try running "composer require symfony/finder".');
        }

        yield from (new Finder())
            ->followLinks()
            ->filter(function D\SplFileInfo $info) use ($regex, $prefixLen, $prefix) {
                $normalizedPath = str_replace('\\', '/', $info->getPathname());
                if (!preg_match($regex, substr($normalizedPath, $prefixLen)) || !$info->isFile()) {
                    return false;
                }
                if ($this->excludedPrefixes) {
                    do {
                        if (isset($this->excludedPrefixes[$dirPath = $normalizedPath])) {
                            return false;
                        }
                    }