Contao\CoreBundle\DependencyInjection\Compiler\AddResourcesPathsPass::getResourcesPathFromClassName PHP Method

    private function getResourcesPathFromClassName($class)
    {
        $reflection = new \ReflectionClass($class);
        if (is_dir($dir = dirname($reflection->getFileName()) . '/Resources/contao')) {
            return $dir;
        }
        return null;
    }