Liip\RMT\Config\Handler::normalize PHP Method

    protected function normalize($config)
    {
        // Validate the config entry
        $this->validateRootElements($config);
        // For single value elements, normalize all class name and options, remove null entry
        foreach (array('vcs', 'version-generator', 'version-persister') as $configKey) {
            $value = $config[$configKey];
            if ($value == null) {
                unset($config[$configKey]);
                continue;
            }
            $config[$configKey] = $this->getClassAndOptions($value, $configKey);
        }
        // Same process but for list value elements
        foreach (array('prerequisites', 'pre-release-actions', 'post-release-actions') as $configKey) {
            foreach ($config[$configKey] as $key => $item) {
                // Accept the element to be define by key or by value
                if (!is_numeric($key)) {
                    if ($item == null) {
                        $item = array();
                    }
                    $item['name'] = $key;
                }
                $config[$configKey][$key] = $this->getClassAndOptions($item, $configKey . '_' . $key);
            }
        }
        return $config;
    }