3 namespace Drupal\metatag_open_graph\Plugin\metatag\Tag;
5 use Drupal\metatag\Plugin\metatag\Tag\MetaPropertyBase;
8 * The Open Graph "Book tag" meta tag.
12 * label = @Translation("Book tag(s)"),
13 * description = @Translation("Appropriate keywords for this content."),
15 * group = "open_graph",
22 class BookTag extends MetaPropertyBase {
23 // Nothing here yet. Just a placeholder class for a plugin.