Symfony\Component\Validator\Mapping\Loader\YamlFileLoader::parseNodes PHP Method

    protected function parseNodes(array $nodes)
    {
        $values = array();
        foreach ($nodes as $name => $childNodes) {
            if (is_numeric($name) && is_array($childNodes) && 1 === count($childNodes)) {
                $options = current($childNodes);
                if (is_array($options)) {
                    $options = $this->parseNodes($options);
                }
                $values[] = $this->newConstraint(key($childNodes), $options);
            } else {
                if (is_array($childNodes)) {
                    $childNodes = $this->parseNodes($childNodes);
                }
                $values[$name] = $childNodes;
            }
        }
        return $values;
    }