// TODO: we may want to (optionally?) provide a global ID, see CentralIdLookup.
+ /**
+ * @since 1.32
+ *
+ * @param UserIdentity $user
+ * @return bool
+ */
+ public function equals( UserIdentity $user );
+
+ /**
+ * @since 1.34
+ *
+ * @return bool True if user is registered on this wiki, i.e., has a user ID. False if user is
+ * anonymous or has no local account (which can happen when importing). This must be
+ * equivalent to getId() != 0 and is provided for code readability.
+ */
+ public function isRegistered();
}