- * - db_id: The DB ID of this item as a nav_menu_item object, if it exists (0 if it doesn't exist).
- * - object_id: The DB ID of the original object this menu item represents, e.g. ID for posts and term_id for categories.
- * - type: The family of objects originally represented, such as "post_type" or "taxonomy."
- * - object: The type of object originally represented, such as "category," "post", or "attachment."
- * - type_label: The singular label used to describe this type of menu item.
- * - post_parent: The DB ID of the original object's parent object, if any (0 otherwise).
- * - menu_item_parent: The DB ID of the nav_menu_item that is this item's menu parent, if any. 0 otherwise.
- * - url: The URL to which this menu item points.
- * - title: The title of this menu item.
- * - target: The target attribute of the link element for this menu item.
- * - attr_title: The title attribute of the link element for this menu item.
- * - classes: The array of class attribute values for the link element of this menu item.
- * - xfn: The XFN relationship expressed in the link of this menu item.
- * - description: The description of this menu item.
+ * - ID: The term_id if the menu item represents a taxonomy term.
+ * - attr_title: The title attribute of the link element for this menu item.
+ * - classes: The array of class attribute values for the link element of this menu item.
+ * - db_id: The DB ID of this item as a nav_menu_item object, if it exists (0 if it doesn't exist).
+ * - description: The description of this menu item.
+ * - menu_item_parent: The DB ID of the nav_menu_item that is this item's menu parent, if any. 0 otherwise.
+ * - object: The type of object originally represented, such as "category," "post", or "attachment."
+ * - object_id: The DB ID of the original object this menu item represents, e.g. ID for posts and term_id for categories.
+ * - post_parent: The DB ID of the original object's parent object, if any (0 otherwise).
+ * - post_title: A "no title" label if menu item represents a post that lacks a title.
+ * - target: The target attribute of the link element for this menu item.
+ * - title: The title of this menu item.
+ * - type: The family of objects originally represented, such as "post_type" or "taxonomy."
+ * - type_label: The singular label used to describe this type of menu item.
+ * - url: The URL to which this menu item points.
+ * - xfn: The XFN relationship expressed in the link of this menu item.
+ * - _invalid: Whether the menu item represents an object that no longer exists.