+ self::$instance = new LinkCache;
+ return self::$instance;
+ }
+
+ /**
+ * Destroy the singleton instance, a new one will be created next time
+ * singleton() is called.
+ * @since 1.22
+ */
+ static function destroySingleton() {
+ self::$instance = null;
+ }
+
+ /**
+ * Set the singleton instance to a given object.
+ * Since we do not have an interface for LinkCache, you have to be sure the
+ * given object implements all the LinkCache public methods.
+ * @param LinkCache $instance
+ * @since 1.22
+ */
+ static function setSingleton( LinkCache $instance ) {
+ self::$instance = $instance;