public function MetaTags(&$tags)
    {
        // Add New Line (if does not exist):
        
        if (!preg_match('/[\n]$/', $tags)) {
            $tags .= "\n";
        }
        
        // Iterate Open Graph Metadata:
        
        foreach ($this->owner->config()->open_graph_metadata as $tag => $property) {
            $this->addMetaTag($tags, "og:{$tag}", $this->owner->$property);
        }
    }